Ai-chan's new semester has started. Although I have a rich daughter who I don't like in my classmates, I'm happy to be able to study in the same classroom as Ryo-kun and Shi-chan, but by chance, Spank caught a cold and I took a break from the second day. Spank felt responsible and decided to go to school instead, but instead of acting as a substitute, the classroom made a big fuss because of failure. Spank who doesn't have a face to match Aiko thinks about leaving home...