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.
I've never seen my brother 
openly stamp his authority like that.
لم أرَ أخي يفرض إرادته إلى هذه
الدّرجة من قبل
Das war das erste Mal, dass mein Bruder
so sehr seinen Willen durchsetzen wollte.
Es la primera vez que dice
tan claramente lo que piensa.
Es la primera vez que dice
tan claramente lo que piensa.
Je l’ai jamais vu agir autant
de sa propre volonté.
Non ho mai visto mio fratello imporsi come ha fatto oggi.
Eu nunca vi meu irmão conseguir 
tanto com sua própria vontade.
Впервые вижу, чтобы брат
так явно выразил свои намерения.