Ochako was on her way to Deku's room, ready to ask him to hang out. It wouldn't be a date per se, but given her feelings for him, she was willing to see it as a sort of 'test run' for possible dates in the future.

She turned the corner, where she could see his room in sight. A smile covered her face as she thought about how much he would probably blush when she asked him out, even if she clarified it wasn't a date. His door was cracked open, and she walked straight up to it, about to swing it open, her mouth opening to speak when she heard a noise.

"Haaaa…"

It sounded like a groan, coming from Deku. Frowning, she paused outside the door, wondering what the source could be. She was about to knock on the door when she heard him speak.

"Eri…"

Ochako reeled back in surprise. Why had he said her name like that? Curiosity began to get the better of her and despite knowing it was wrong, she gently eased the door open enough for her to peek inside.

And she had to hold in a gasp at what she saw.

Deku was completely nude, his hand resting on Eri's head as her head bobbed up and down between his legs. The young girl was naked as well, and Deku used his other hand to stroke her bare back. Ochako stared in complete horror at what she was seeing, unable to fully process that Deku was having a child suck his cock. She couldn't believe the man she loved was capable of such a horrific thing.

She watched as he slammed her head down as his head reared back, Ochako blushed deeply as she realized he was probably cumming. She knew she should look away, find someone, tell someone he was doing something illegal, but her legs wouldn't move.

Instead, they wobbled.

Once Deku had finished, he lifted Eri with ease, allowing Ochako to see the girl's nude body in full, where she had to admit that the young girl's body was certainly soft-looking.

He lifted her into his lap and started kissing her, Eri throwing her arms around his neck to kiss him back. Ochako was surprised to see they were even using their tongues.

Her biggest surprise was that Eri seemed to be enjoying it, and her eyes began to wander downward, where she eventually caught sight of Deku's cock. Her face turned a bright red as she took in the sight of just how large it was. Of course, she didn't have much experience in what was a 'standard' size for dicks, but it certainly looked large, and it wasn't even fully erect!

Ochako didn't stop to consider the fact that she was slowly growing less horrified by the situation. She felt a strange tingling across her body as watched Deku's cock slowly becoming hard again, growing inch by inch until a few minutes later, it was at full mast again, standing tall and proud.

Ochako's hands began to move on their own, sliding underneath her skirt and pressing against her panties, where she was surprised to find herself getting a little damp. She bit down on her finger, knowing what she was about to do was very, very wrong, but as she began to rub herself, she found she didn't really care.

Her eyes widened once more as she watched Eri get picked up again, breaking apart their kiss and leaving a strand of saliva between them as he positioned her above his cock, Ochako looking briefly at the girl's pert, adorable little butt before Eri was dropped onto his cock.

The sound of it, both of the organ entering Eri and the sound of the twos' moans made Ochako shudder. Her hand slid up and down into her panties themselves as she began to finger herself rapidly, coating her finger in wetness.

Deku and Eri went at it for a while, slowly gaining speed as he repeatedly lifted her and slammed her back down, the both of them gasping once more. Ochako bit down hard on her finger to keep her noises in as she plunged her other finger in and out of her pussy, pressure building inside her. It was so wrong but it felt so right. She wasn't even fully sure what part of this was making her feel so hot, but she wanted it to last forever, this feeling of horniness.

Deku rubbed at Eri's chest as she rode his cock, both of them moaning each other's names as Ochako couldn't take it anymore. She moved her free hand to her breast and squeezed, almost immediately switching to thrusting the hand underneath her clothes and underwear to grasp at it directly. The touch only strengthened her arousal further as she gasped and trembled. She could barely keep her body standing as she watched through the crack.

Deku looked so happy with his fucking, as did Eri. They moved at an almost blinding speed as he rubbed her nipples, his moans so loud she was surprised no one else in the building could hear.

Ochako came first, pinching her nipple and plunging her finger as far in as she could as she stained her panties with her cum. Seconds later, Eri and Deku came as well, both rearing their heads back as they erupted, Deku's cum filling her pussy instantly and exploding out of the sides.

Everyone rested to pant once they all finished riding them out, and Ochako fell away against the wall, sliding down as she realized what she'd just done.

Once again, she knew she should report this right away, even if she knew Deku was a good person, even if she did love him, but…she just couldn't.

She heard Eri and Deku speaking but felt too winded to make out the words. Her thoughts felt swirled and out of control, but one prevailing idea won out.

The idea that she'd been aroused by whatever just happened.

So Ochako picked herself up and dusted off her clothes as she took one last glance through the door to find Eri cuddling up in the boy's naked lap, looking almost peaceful enough that Ochako felt a twinge in her chest. She wouldn't let it get her down though, as she had a plan. It was a basic one, for sure, but it was a plan nonetheless.

So she gave them one last look before walking away, where she would go to bed like normal and confront them tomorrow, and whatever happened from there, she'd let it be.