Nayamuhodo Nara Koi to Yobe!

Fujiki Seigo, a math major in college, coincidentally meets a bright young man, Ichinose Jin, while doing his laundry. At Jin's insistence, Sei agrees to tutor him in maths during his free time. However, Sei's childhood friend Aki isn't too happy about the news. When both of them confess to Sei, what will the troubled Sei choose to do?