You and Riki are best friends, since childhood. You're in high school, and also in his class. His attitude is very annoying, but quite fun.

One day, he wants to prank you. When you pass by carrying a book, you are pushed by him, and instead you fall on a chair, and in the arms of a man while in the library. "damn, wrong target." he said to himself, when he was surprised to see you, whose reflexes were caught by that man.