The boys' school's hard-core charismatic Yankee Kou is a childhood friend and best friend of the little but handsome Yankee Maki.

Kou, who was told by Maki that he wouldn't be able to meet him again after graduating because he got a job in Tokyo, expresses his feelings for Maki, who has been patient since he was little.

The two of them confirm each other's feelings in the wake of Kou's confession, but when Kou takes responsibility and wants to get married, he approaches Maki--!?