Tomomi Senpai Gomennasai.

Tomomi Obata with all her pure love came to stay with you.
You do a bit of roleplaying, leading to her submissive bondage.
Her helpless body laying there, triggers a switch inside you.

A short adult-oriented visual novel game about the depraved sexual change that results from sadomasochistic binding play. Her little abdomen stretches out with heavy deposits of semen that keep spurting into her womb...

[From DLsite English]