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...
Why not?
لماذا؟
Hä? Wieso das?
¿Por qué?
¿Por qué?
Eh? E come mai?
Por que não?
Почему же?