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 apparently you've become a failure.
لكن يبدو أنّك أمسيتَ فاشلاً
aber du bist unfassbar missraten.
pero resultaste ser una decepción.
pero resultaste ser una decepción.
mais tu es devenu
un incompétent pitoyable.
ma a quanto pare anche tu sei un fallito.
mas pelo visto você virou um fracasso.
Но ты вырос
невероятной бестолочью.