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.
But if my happiness only came
as a result of another's tears,
لكن لم أطمع يوماً بلحظةِ لذّة ناجِمة
عن إبكاءِ شخص ما
aber eine Erfüllung,
für die jemand weinen muss,
pero nunca quise ser feliz
a costa de las lágrimas de otros.
pero nunca quise ser feliz
a costa de las lágrimas de otros.
mais laisser des gens en pleurs
sur notre chemin
Però non mi è mai interessata nessuna gratificazione
Mas eu nunca quis satisfação 
nenhuma que viesse
но никогда не желал полной жизни,