Valentine's day. A day a lot of teenagers choosed to confess and giving sweets to their loved ones or crushes. Midnight decided something original as a dress up confess. The students has to dress with their crush's hero costume.

It was the day and Midnight planned a robot against fight to motivate the students to show their costumes. Katsuki was just watching the fights, thinking if he should do it too or keep his feelings to himself.