Koizumi-san is a reserved and mysterious high school girl.
Her classmate Ohsawa Yuu is very interested in this new transfer student. 
One day on her way home, she happens to see Koizumi-san in a long line in front of a ramen shop, which leads to them eating ramen together, and yet...
I'm a Leo, blood type O.
.O أنا من برج الأسد، نوعية دمي
Sternzeichen Löwe,
Blutgruppe 0.
Leo y tipo de sangre O.
Leo y tipo de sangre O.
Sou leonina, tipo sanguíneo O.
Лев, первая группа крови.