Summer Hand Power

A girl with a modest bust finds a tentacled creature named Iso-kun lurking in a pool's pump room, and out of pure curiosity lets it crawl over her swimsuit. It's gross, but it feels good, which is exactly the problem.

Airi keeps going back for more, and the second visit costs her something she can't get back. From there the story follows her slide from curious bystander to something the creature has decided to keep, tracked through a visual novel format with voiced scenes and more than one ending depending on how far she lets things go.

The player mostly reads and chooses, watching Airi's encounters escalate from a first fumbling touch into the fuller, stranger consequences the tags already hint at. It's a short, tone-shifting story rather than a sandbox, and it knows exactly what kind of tragic it's aiming for.