Comment what you would like to see in future chapters. Very short chapter right here.

Warning:May contain cub content, but the following story is not for cubs... 

*Alvin and Simon are at the mall, Dave dropped them off on his way to the doctor's for a life insurance physical and Theodore is home with the flu.*

 "Hey, Sy! Let's go check out the chicas!" Simon sighed and ignored his brother as he slicked back his hair and tried his best to look suave. While Alvin loved attention Simon was often thankful that he did not have the taxing social life Alvin did, but he did wish for someone's affection. Simon sighed once again and stared off in the distance."Are you okay?" Alvin asked in one of his rare thoughtful moments. 

"I broke up with Jeanette, or, rather, she broke up with me."

 "Well, that's a bummer," Alvin's reply fell short of uplifting "But it doesn't mean you shouldn't have some fun!" 

"You don't understand, she wanted to..." It took a moment for Alvin to piece it together. 

"And you couldn't?!?!" 

"I wanted to, but whenever I think about it..." Simon turned a fierce scarlet and then a barf green.

 "Nervous," Alvin wore a devilish grin "No problamo!" Simon's face lit up. 

"You can help?" 

"Sure, first we should start with kissing. Let me see what you got!" 

"You can't be serious." Alvin stood his ground. Simon looked around the food court to be sure no one was watching and then gave Alvin a quick peck on the lips. 

"Aw, what was that?!? No wonder Jeanette broke up with you... Where is the passion?" Alvin leaned forward and forced his tongue in to his brother's mouth, filling it. Simon struggled at first, but gave in to the new sensation and when the kiss was broken he came away with tented pants. Alvin's smile grew wider. "Okay, now your turn." Simon hesitated for, what felt like to Alvin, an eternity. 

"Is he doing this on purpose? Why do I feel this way?" Simon asked himself, but gave up as the questions failed to grow to fruition. Instead he threw his negativity away and grasped Alvin by the back of the head and kissed as passionately as he could and when they were done both brothers were left panting. 

"Come on." Alvin lead Simon to the back of the mall to a furniture store undergoing construction, slipping behind the cardboard deviders with the store's logo and the paneless window frame before arriving at the bed in the main display window.

 "Are you sure about this?" Simon asked. 

"Relax. Nobody's gonna find us here." Alvin whispered. He pulled down his brother's pants and underwear revealing his throbbing erection. Then Alvin ran his hands up Simon's sides and pulled off his shirt ever so slowly before pushing him back on to the bed. Alvin undressed sensually, rocking his hips, tearing off his shoes, slidding down his shorts and kicking them off, until he was wearing nothing but his signature hat. Then Alvin kneeled between his brothers legs, teasing him with a soft touch and hot breath before plunging the entirety of his cubhood into his mouth. 

"Ah!" Simon moaned, Never before had he felt any such sensation. Alvin tickled the tip with his tongue and rolled Simon's balls with his pawtoes. Simon could barely think and began instinctively humping his brother's mouth. 

"Alvin I- ugh- I" Alvin pulled off and caught Simon's seedless load into his mouth. As Simon lay in orgasmic afterglow Alvin jumped onto the bed and pointed his erection into Simon's face. 

"Uh, hello? I'm pretty sure it's my turn." Simon leaned his head forward, dazed. "Oh, I guess you won't mind if I use the other end." Simon shot up and jumped off the bed. "That's what I thought." 

He grasped his brother's cock unsure and gave an experimental lick. It didn't taste terrible.

 "Hurry up already!" Alvin pulled Simon's head forward. "And watch the teeth!" Having Alvin's munkhood forced into his mouth made him gag, but Simon could not pull back because of Alvin's unrelenting paws. Instead Simon calmed himself down and went to work. His inexperienced suckling driving Alvin wild, he explored his brother's dick with his tongue sticking it into the slit and wrapping it around the head. Alvin with was toying with Simon's ears while enjoying the fruits of his labors until all at once the sensations seemed to peak and Alvin burst without warning. Simon gagged and pulled Alvin's munkhood out, it squirt twice more, covering his face and spurting onto his glasses. 

"Can I get a heads up next time!?!" Simon shouted before realizing where they were. Alvin's hand shot across his mouth and pulled him back behind the display bed just as a security guard poked his head in. He looked around a bit before noticing a full outfit of clothing and a shirt lying on and around the display bed (Simon's pants, shoes, ect. are still around his ankles). The guard picked up the clothing. 

"Is there a kid running around without clothes on?" He gave another look around the store, before going to turn the found items in at the lost and found. Once the guard left the two munks began arguing. 

"Why would you scream, naked, in the middle of the mall?!?" Alvin spat.

 "You started this whole thing!" Simon returned. After some more back and forth Simon noticed that no guards had come since. "No... No.No, no, no, no no no-no-nonono!" He screamed. 

"What? What is it?" A worried Alvin asked. 

"We are most likely trapped in the mall." Simon said leaving Alvin with a devious smile. 
"Alvin, I don't like that smile." Simon pulled up his pants, frowning at his brother. It was his fault they were stuck in this mess and he called him unpassionate. Thoughts ticked by in Simon's head.

 "What? Now we can do what ever we want!!!" Alvin exclaimed running to find a new outfit at the nearest clothing store, only to discover the shutter pulled down and locked."No!" He cried. 

"Well, what did you expect? The entire mall is closed!" Simon knew that wasn't true, the employees left the doors marked 'Employee Only' unlocked often and the entrances could always be opened from the inside, but he enjoyed the strange superiority he held over Alvin by having clothes. "I guess we could try the other shutters..." They split up, the two finding few unlocked; a toy store, a pet shop and a conveinance store of sorts (not conveinant enough for Alvin as it didn't carry any clothing). 

"Well, I am going to check out Toys 'R Us, you coming?" Alvin's lax demeanor returned. 

"No, I wanted to look at the animals." Simon smiled as Alvin bounded away, he had no idea what was in store. Once Simon entered the pet shop he looked for what he needed; leashes and a few other items. Then he snuck behind his brother browsing through Nerf guns and tackled him.

 "Ugh! Simon what are you doing? I- Ah!" Alvin's wrists and ankles were tied to either side of the aisle with the leashes and never felt more naked and vulnerable. "Ha ha, very funny, now untie me!"

 "Not yet" Simon ran his fingers up Alvin's chest and stroked his cheek. 

"Um, Simon." Alvin's penis peeked out of it's sheath. 

"It's okay." Simon reassured him, then undressed, putting his clothes aside with his bag of goodies from the pet shop, and pressed his cocktip to Alvin's lips. Knowing that it was a game now Alvin played along and accepted his brother's erection into his mouth and sucked gently and slowly until Simon forced it in to the hilt. Simon pulled away from his gagging brother, a trail of slavia trailing behind, and walked over to Alvin's other end.

 "Simon don't-" Alvin was too late as Simon slammed into his small anus. "Aahh!" His eyes welled up.

 "Relax." Simon said, pumping away, and Alvin wet himself. "Not that much." Simon leaned down and nibbled his brother's ear. Alvin whimpered quietly, Simon had been transformed into some sort of monster. Simon kept repositioned himself slight trying to find it... 

"Mmh." Right there. He found the other chipmunk's prostate and prodded it relentlessly. Simon began thrusting with an animalistic fury, pounding faster and faster until- "Ow!" Simon spasmed and held Alvin close, bursting his immature seed inside his sibling, neck clenched between his teeth, panting. Silent moments passed. "Yeah, yeah, that was very passionate, now can you untie me?"

 "Hold on I want to try something..." Simon whispered. He tuned out Alvin's complaints and sat between his legs, stroking his length to the edge and backing off.

 "No, why did you do that?!!? I am so close!!!" Alvin humped up at the air, uselessly. "Please?!?" Simon tuned him out again and restarted the process, doing it twice more. "Please, it hurts, PLEASE!" Alvin begged.

 "Alright, bugs or electricity?" Simon asked the question as if it was completely normal.

 "What?!?!" Alvin was bewildered, but Simon just stared, smiling. So he thought for a second and said "Bugs."

 "Alright electricity it is." Simon grabbed a shock collar and it's controller from the bag, despite Alvin's protests, and strapped it around the bound rodent's waist, the exposed metal on Alvin's cocktip, and pressed the button. Alvin's genitals flexed and his hips thrust skyward as he screamed. When Simon released the button he smiled at his brother's reation, turned a dial on the controller and lowered the shock collar. Simon pressed the button again and the bound chipmunk's nuts tried to jump into his body during his screams.

 "Please stop..." Alvin was crying. Simon placed the collar on his balls. "No!" 

"It's almost over." Simon held the button down until Alvin came all over his stomach, leaving him breathless. 

"That was Awesome!" Alvin broke the silence. Simon removed the leashes and collar from his brother and they returned to the furniture store and laid down. Simon, still aroused from Alvin's show, mounted him. Alvin got up onto all fours.

 "I need this." Simon whispered, rocking Alvin's body with his own. 

"I love you." Alvin replied and woke up in his room.
Alvin woke up flustered and his eyes darted around the room. Finally he realized he was back in his room with his brothers. His sheets and covers were spotted his spilled, premature seed and as he lie across them he noticed his erection obscenly jutting out of his pj's. Quickly Alvin put it away, changed his clothes and bed clothes and put the old ones in the washer before sitting in the living room and turning on the tv. Staring, not really paying attention, but going over his dream in his head endlessly.
"Another 'interesting' dream, huh?"
"Simon! Uh.... Hehe, yeah" Came Alvin's akward reply. Simon shut off the television.
"I think that thing is rotting your brain," Simon joked "So, who was it this time?"
"Um..." Talking, why wasn't he talking? "Brittney, yeah, Brittney!"
"OK..." Simon seemed skeptical.
Days passed... Alvin noticed himself staring at his little brother often, but unable, or unwilling, to stop himself. Why couldn't he stop thinking about him, it wasn't like this before... He stayed home, it was easy to get one over on Dave. He didn't do much, but he needed the time to reflect. Around noon he leaned under the shower, distraught, thinking of his problem.
"Alvin!" Simon cried, he heard a door slamming and a choked sob. As quickly as he could, Alvin shut off the shower, dried himself with a towel and wrapped it around him. Simon lie, curled up in a ball on the couch.
"Si? What's wrong?" Alvin crossed the room, jumped onto the couch and stood by his brother. "Are you okay?"
"I was bullied by some thick-skulled ruffians and..." he was weeping openly.
"Shh... It's gonna be alright..." Alvin's voice more tender than ever, he softly stroked Simon's face and sat down. Alvin dressed and made some cocoa. He talked with Simon and soon they were joking and Simon was back to normal.
"You know, Si, I didn't think you had it in you to cut class. What could those 'ruffians' did that was so bad?"
"Well, I... became aroused and then one of them pulled my shirt off and I had nothing to cover myself with. They made fun of my size and.."
"They do know you're a chipmunk, right?" Simon giggled, Alvin always knew what to say.
"Thanks for cheering me up."
"Yeah... I love you..."
"Love you, too."
"No, Simon, I love you." Alvin kissed him, his tongue softly probing the inside of his mouth. The kiss broke and Dave and Theodore entered.
"Simon. There you are, I waited forever at the school. And Alvin, I see you're better."
"Yeah." was all the pair could muster.
Grounded. The two chipmunks were confined to the house for the week. Theo was off with yet another new friend and Dave has a bunch of meeting set up to negotiate the chipmunks' contracts with various institutions.
"You love me?" Simon asked, bewildered. Alvin sat silent on his bed. "Are you stupid? We're brothers."
"I didn't hear you complaining during that kiss..." Alvin crossed the room to his brother.
"Alvin... I-we-"
"Shh... Just let this happen." Alvin's voice and eyes pleaded. He pushed their lips together and explored his brother's mouth with his tongue and ran his paw down Simon's stomach and to his sheath, teasing it gently. Alvin pushed Simon onto his bed and stroked him until he was fully erect. He licked up and down the other chipmunk's length before taking it all into his mouth and sucking gently, toying with his brother's balls with one hand and masturbating like a piston with the other. This is all he wanted for days. Simon's hot pants rained down him, egging  him on. He slipped a fingertip into Simon's tight, pink hole as Simon humped softly into his mouth.
"Oh, Alvin... Alvin, I'm gonna... Ugh!" Simon burst a jet of clear liquid into Alvin's mouth and he swallowed it and continued suckling and pumping his fingers in and out of his ass until his brother was soft. "Well," Simon said, straightening his glasses "That was... Interesting."
"Oh, it's not over yet. Wait rrriiiiight there." Alvin dashed out of the room and was back in a flash with a jar of vaseline. He opened and placed it on the nightstand between the beds and smeared some over his already hard length.
"Uhh... What's that for?" No reply. "Alvin? Oh!" He felt the cool gel spread around his anus. Alvin placed himself af Simon's  hot opening and thrust into him. "Agh!" Without being trained, the experience was down right painful for Simon, but Alvin couldn't stop, this has been on his mind for what seemed like an eternity. Alvin pump in and out, faster and faster, with an animalistic chipmunk lust. Before long Simon's mantra of "Ow, ow, ow" became "Oh, oh, uh" as Alvin inadvertantly began prodding his prostate. Alvin locked lips with his younger brother as his heart beat reached it's peak. Simon burst his immature seed across Alvin's stomach and his body shuddered, muscles clenching, the act sending Alvin to a new realm of pleasure as he gave a final deep thrust and flooding his rectum.
"Simon... Simon..." Alvin panted, hugging his brother close until they both fell asleep.