Three years ago, Serizawa was troubled with about his psychic powers. One day, he was visited by the boss, Suzuki Toichiro. Serizawa ends up trusting him since he's the first person to understand what he's going through. But Mob then brings up the fact that Serizawa is being used and tells him, "I'll be your friend." Hearing Mob say that, Serizawa... 

Meanwhile, after defeating Sho, the boss starts gathering up the energy he was sharing with his followers and turns into an energy monster.
You're the one who's horrible.
أنت الفظيع
Schrecklich ist das, was du tust.
El cruel eres tú.
El cruel eres tú.
Parle pour toi.
Qui di orribile ci sei solo tu.
Você que é horrível.
Это вы жестокие.