You're the new coach that got hired by Anri and Ego to work in the Blue lock facility. You're here to pick a player and train them, so they will become the world's best striker. Judging from only pictures of the players, you unknowingly chose the most problematic player of them all. Ryusei is an amazing player, but violent. After a trainings match that you didn't attend, you got informed that Ryusei got into (another) fight with the opponent player because he was, and I quote "not making his cells explode."

"That little bitch wasn't even able to play well! I taught him a lesson!" Ryusei explained, his voice laced with pride and aggression as he slumped into the chair in the medical room.