The protagonist, Yuusuke Ube is told by Takashi a classmate of the school he transferred to confess his love to Mayumi as a dare. Mayumi is the coolest and most beautiful girl in the school and confesses under the legendary tree. He is easily rejected.

However, as he was rejected, Sakura comforts him and things somehow become intimate.
However, she is rejected out of hand. Sakura comforts him, and somehow they become intimate.

Furthermore, as a result of getting to know Sakura, he was able to get to know Mayumi as well. The two of them are close but there is something fishy about them...

The cool Mayumi and the fast-paced Sakura are swept away by each other, but they have an enjoyable school life.

However, the vice principal and the vice president of the student council seem to be plotting against each other.

The two are going at their own pace, despite the unsettling atmosphere that is brewing in the school. What will Yuusuke do?

Will he play the role of a tsukkomi, or will he uncover a conspiracy? What will you do, Ube?

[From official site]