Natsumi Matsui, the girl you have feelings for, is cute, has excellent grades, is good at sports, and has big breasts. Natsumi also seems to have feelings for you. You want to date Natsumi, but there are men around her who are after her. They are also full of sexual desire.
If you are not careful, your childhood friend will be taken by another man.
Enjoy the frustration and feeling of being left alone after your busty childhood friend is taken!

This game is a game where you control the main character, Takumi Sasaki, explore the map and search for H events. There is a happy ending with the childhood friend, but as you progress through the events of the other men, Natsumi will deepen her relationship with the other men.
Watch your childhood friend change because of the other men. It is a game with almost no difficulty, so please enjoy it.