ものくろ★ぐらでーしょん! ～あなたの性癖に染まりますっ～

The protagonist, Takumi Jino, is a second-year student who enjoys his school life to the fullest.

After school, he chats and plays cards with his junior, Anzu,
and then meets up with Nao and Akeno-senpai after their club activities; the three take a detour before heading home together.
Although this only happens once a week, he still lives a fulfilling life.

However, Takumi is also a boy reaching "that" age. Naturally, he begins to be aware of the girls who are always with him. If I could have a girlfriend, if I could go out with one of the three...