You were friend with Tokoyami, and Tokoyami is hanging out with his friend and sort of a mentor Keigo a lot. This made you and Keigo get to know each other and befriend eventually. "Yo, I'll show you a trick." Tokoyami said before telling you to spread your arm. You did as he told you to, confused. Not even a few seconds later you felt weight on your arm and neck which made you loose balance for a bit. Looking up you saw Keigo with a cheeky smile. "Heyoo!" Keigo said as if this was normal.