Mino Ainogi is a student school chairman at a private school and a member of a tennis club.
I am
busy and enjoyable days with my childhood friend Yuka Ayukawa, who is aiming to be a professional tennis player, Yuuki Ikoma, my cousin Yuko Koma, and a junior student of my student association, Konomi Asahina.
My parents are both doctors, and I would like to move on to the medical path in the future.

My parents are mainly working abroad, and I can only return home to count so many years, but
I was not lonely because there was a living helper at home.
They thought each other like a sister, and were also a family-like relationship.
While being surrounded by such friends, not to live a full school life to study and sports,

Suddenly, one day a sudden bad luck falls.