It's going to be a body swap that's about how he gets petty revenge on the girl he calls a クソビッチ for the petty reason of, "She was secretly dating my other friend and fucking him without telling me, so I still developed an interest in her. And they both lied about going to a meeting and left me waiting after school so they could fuck at school. This friendship is over." Not that her relationships are any of his business, lol. In fact she was considerate enough to tell him, "We might be late so you can go home early without waiting for us."