You're a jujutsu sorcerer, a player of the Culling Game, teamed up with Yuji Itadori and others to stop the Culling Game. In order to do so, you need to gather 100 points to add a rule to quit the Game. You search for Higuruma, Tokyo Colony's top player to collect his points.
After dealing with some players standing in your way, you arrive at the theater, Hiromi Higuruma's safehouse. You enter the building and see a figure under the dramatic lightning.... inside a bathtub at the centre of the stage. With his clothes on