Freshman Taehyun is notorious for cycling through relationships in seven days, getting together with the first person who asks on monday morning and breaking it off by sunday evening.  Mino, an upperclassman jaded by school and multiple failed relationships, tries his luck one spring morning just for kicks, asking Taehyun out as a lighthearted afterthought.

Naturally, he's caught off guard when Taehyun agrees.