Leo was a young tiger only having turned ten a few weeks ago. He was often left alone at home, since his parents had to work and his older brother rather spent most of his time with his supposed girlfriend, then looking after his younger brother. The latter was the biggest bane to Leo's young life. While he didn't really have an interest in women at his young age, his brother's consistent bragging made him feel like he was missing out.
While they have had the talk at school recently, his fellow classmates seemed uninterested in trying anything unlike the tiger cub. They were just like he was a few months ago before his brother began bragging and describing the acts he was performing with his girlfriend. Leo just wanted to feel included and was envious of his brother.
This had led to Leo playing with himself and discovering the pleasure at a rather young age. His parents were oblivious to their son's plight, being too busy with work and assuming the brothers would take better care of each other. So the young tiger felt more and more desperate to experience what his brother was talking about, but unfortunately no one seemed willing to help him out.
Growing more and more desperate as the persistent teasing of his older brother drove Leo insane, a thought appeared. His parents had recently adopted a pet, in an attempt  to teach Leo responsibility. It was a female white furred rabbit quite cute but not what Leo had wanted. While he had been uninterested in the creature so far, that would quickly change if his plans worked out.
Soon after he made up his mind, when he was once more left completely alone at home he acted. Removing his clothes his cock sprang free already excited for what was to come. Without further hesitation the cub climbed into the rabbit's pen. The young bunny was expecting pet's like usual when someone joined her in her pen. So she quickly came rushing over to the boy, her small tail twitching excitedly.
While Leo knew what he was about to do was wrong, he couldn't bear with his brother's persistent bragging any longer. Wanting to lose his virginity badly he knelt down and moved the feral creature closer to his twitching dick. While he was expecting to have to act more forcefully the bunny instead surprised him and began licking the pre cum already leaking from his tip.
While the bunny didn't know what she was doing, her nose twitched as she smelt the salty liquid and like all animals was drawn to it. At first that was all that it was, the musk coming from the boy's crotch soon changed something in the small critter, making her go into heat. Leo meanwhile was frozen still too scared and excited to move as he felt the bunny's small yet warm tongue dragging over the tip of his cock.
Soon the pleasure was mounting but it wasn't quite enough to push the boy over the edge yet he remained still for the moment not wanting to scare the white fluffball away. However even when his cock suddenly shot a big rope of pre cum over the bunny's face she didn't seem to mind and kept going which emboldened the young tiger.
Slowly Leo reached for his cock and seeing the rabbit didn't hesitate to keep licking his cock he began stroking himself to aid her efforts. The tiger cub slowly grew to understand why his brother was always bragging about doing it, since this sensation was truly incredible. He wasn't even sure at this if the licking itself or the mere thought of what he was about to do to the bunny was more pleasurable.
Regardless of the answer, the boy soon knew he was close to reaching climax and unsurprisingly forgot about the bunny in front of his cum gushing cock. With his eyes closed as the pleasure was overwhelming he showered his pet with his hot seed. The bunny squealed when she was suddenly covered with sticky cum, quickly getting to clean herself up she was delighted by the salty taste once more. 
Lucky for the cub the bunny's white fur was aiding in the cover up afterwards, if not he might have found himself pressed for time to help clean her up as a quick glance at the clock revealed his parents were soon coming back home. Lucky for him she seemed eager to clean herself up and even if she didn't finish in time it wouldn't be noticeable.
Quickly cleaning up the worst of his mess in the cage itself, he left the confused feral in her cage and cleaned himself up as well in the shower. Fortunately no one suspected a thing throughout the rest of the day even if he felt like everyone could hear his thumping heart. Even more surprisingly the rabbit seemed much more attached to him over the coming days, seemingly eager to repeat their actions.
So when the weekend finally came where his older brother predictably was with his girlfriend again while their parents were working overtime Leo was ready once more. Even before he entered the pen of his now beloved pet, the bunny seemed to get overly excited as soon as he began to undress himself. So to not keep the poor girl waiting he quickly stepped into the enclosed space and knelt back down like he did the last time his cub cock throbbing eagerly for attention.
However unlike last time the bunny didn't seem to want to lick the tip of his cock like the boy expected, instead she was eagerly rubbing her nethers against the tip. While he was a feline Leo still had a humanoid cock like all anthros in this world. Regardless of a lack of a tapered penis, which might have made the next step easier he was eager to make it fit regardless. He knew what was coming next and the bunny clearly seemed ready for the same so he held her down and started pushing his hard cub meat against her tiny entrance.
He felt the warmth of her body pressing against his cock, but clearly it wasn't that easy to make it fit due to the size difference. Even with the bunny clearly eager to get some action herself it seemed like no pushing would do the deed without hurting his pet. He was about to give up when he surprisingly saw and felt the tip of his cock sink into that tiny hot hole. For a moment the boy was stunned and had to assess the situation. The sudden shock of what happened made him snap back to reality and concern for his pet quickly rose up.
However worry seemed needless as the bunny twitched and squirmed at first, but seemed pleased and even pushed back a little soon after. She had felt his hot tip rub against her pussy and her instincts told her what was about to happen to her. However she wasn't prepared for how big he was compared to her, her instincts not able to comprehend more than the need to be bred. So when his hot and hard cock forced its way inside of her a sudden shock rocked her body.
Her feral nature still screamed at her to keep going so without giving herself time to adjust she began moving herself back onto his cock to beg for more. Her new mate wouldn't disappoint either. Soon after his concerns faded and the boy began pushing his cock deeper inside the bunny, making her look comically distorted and surprising both of them that it was possible. Even more excited now feeling incredible Leo  eagerly began thrusting his dick in and out of her hot pussy.
Due to the size difference of the pair, the bunny's wet walls were hugging his cock incredibly tightly, adding to the pleasure for the inexperienced boy. At this point there was no more holding back as he began ravagin the critter in his hand. While at first he was holding her down on the ground the position soon grew uncomfortable. So he just picked her up and used her like a sextoy with no regard for the bunny.
While most regular partners wouldn't have appreciated this treatment the bunny was a feral and her most important objective was to be filled with his potent baby batter. So she was happily twitching as her mind was already corrupted by the boy's pheromones from their previous encounter, ready to comply with whatever he wanted to do with her as long as he would fill her womb. The hot rod distorting her body just meant she would be his forever, which as a bunny was already natural for her.
Leo soon felt his orgasm build up, his cock was aggressively throbbing ready to unleash his load inside his partner. For a moment he considered if he should pull out not wanting to risk pregnancy. But then he remembered that usually “normal” interspecies breeding was already troublesome, so there should be no risk impregnating a feral. With that in mind he happily pumped his juvenile baby batter inside his pet.
The amount quickly proved too much and his cum started splattering out around his cock. The bunny felt satisfied as soon as she felt the hot cum pouring directly into her womb and impregnating her. Leo however didn't know anything about that happening so he only felt exhausted and satisfied after breeding his pet and was sure to do so many more times that day.