Kanojo ga Eranda Saizenshu

Life consists of a lot of choices that can be for getting or defending something.
Either way, to keep choosing the "bests" is hard to accomplish.

Aki Isshiki is the protagonist of this story.
This game is a simple adventure novel where you help her overcome
a trouble of "bellyache during class" which she is in the face of.

[From DLsite English]