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.
No one understood this power
I was born with!
لم يفهم أحدٌ هذه القوّة التي وُلِدتُ بها
Keiner hat Verständnis für die Besonderheit,
mit der ich geboren wurde!
¡Nadie entiende mi peculiaridad innata!
¡Nadie entiende mi peculiaridad innata!
Personne me comprend
depuis que je suis petit !
Nessuno ha mai capito
il potere che ho fin dalla nascita.
Ninguém entende esse
poder que nasceu comigo.
Мою врождённую особенность
никто не понимал!