"Kissing a guy just for skinship...I wouldn't do that!!"

Yojiro, a high school student who has a hard time making friends due to his family's business, meets Hideaki, a senior student a year above him, on the school roof one day. He realizes that his father has approached him to help him make friends, but Hideaki treats him without regard for Yojiro's family background. When he can't help but relax at Yojiro's carefree attitude, Hideaki suddenly kisses him!? He says it's just skinship, but it gradually escalates...