At the Onsen Hostel

"I know you like it warm, but don't stay in the water too long, Tsuyu." Finally, the last of the girls, Momo, has left the hot, steamy onsen.

After class 1-A arrived at the hostel, there was barely any time for Tsuyu to take care of her unfinished business. But now, alone in the warm water...

"I won't Momo, good night." Tsuyu could barely keep it together, her hands already sneaking towards her pussy, while Momo was wishing her a good night as well.

The moment her classmate left the outdoor pool, surrounded by rocks and a large wooden fence, was the moment Tsuyu's long, frog-like tongue came gliding out of her mouth.

It snaked around one of her breasts, lathering it with saliva, pressing its tip into her nipple as Tsuyu began to rub her clit.

When Tsuyu became horny enough, her tongue would seemingly take on a mind of its own. Maybe this is what it means, to act on a hero's instinct? When your body moves with barely any conscious input? Tsuyu's thoughts were pushed aside, as she felt her tongue shoving roughly into her cunt.

She whimpered. When did her tongue move between her legs? Tsuyu half-heartedly tried to wrestle control over it back from her desire-driven impulses, but found she couldn't. It began to roughly plow into her pussy. In long, powerful thrusts. She couldn't even stop it with her hands, so powerful was her muscular, quirk-born organ.

And even if she could, deep down she knew she wouldn't want to. Instead, she pressed her supple breasts around it, still slick and glistening with spittle, as it wriggled deeper and deeper into her tight vaginal canal.

Tsuyu let out a repressed gasp. Powerful jolts of pleasure spread through her body. She bucked her hips involuntarily into her tongue, urgently rubbing her tits along what was basically its shaft. She thought back to Mina, and the hour-long edging on the bus. Careful now. My climax will probably be strong enough to make even me lose control.

She moaned as low as possible, under the constant splashing of water, while her own tongue ravished her cunt beneath the surface. She let go of her now freely jiggling breasts, grabbed the rocky edges behind her for support, and spread her legs invitingly. Beckoning the familiar invader to finish the job. I'll have to remember to be quiet when I...

A loud moan ripped through the night.

Tsuyu froze up, her tongue did as well. What was that?

Hot shame and panic rose up in her. Is someone here? Did someone see... Her tongue snapped back into her mouth, leaving behind a feeling of longing and emptiness.

"Erm... hello?" No answer, instead another moan, splashing water and heavy breathing. Someone is here!

Tsuyu dove underwater, but couldn't locate any other person. Despite that, she couldn't bear the thought of being caught like this. Flight seemed to be the safest option.

She swam across the onsen and towards the exit, where she hurriedly dressed and slipped into the hallway, wistfully leaving her imminent orgasm behind.

Back at the pool, traces of water drew the outlines of a voluptuous, invisible girl, emerging from the surface. She giggled, and gave her still sensitive pleasure nub a couple final, shiver-inducing pinches, before skipping happily and content after Tsuyu.