In an attempt to help pave the way for Yanagi-sensei's wedding, Nasa ends up teaching a programming class at a girl's high school.

After a texting mix-up, Nasa is recruited to help one of his students confess her feelings to the guy she likes.

Gekko Kaguya is Nasa's brightest, and most mysterious new student. What is her connection to Tsukasa, and what might it mean for the future?