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.
He rescued me from
the hellhole that was my life.
أنقذَني من حياتي الجحيميّة
Er hat mich aus meinem
dreckigen Loch rausgeholt.
Me sacó del pantano
en el que estaba sumergido.
Me sacó del pantano
en el que estaba hundido.
C’est lui qui m’a sauvé
en me sortant de mon trou à rat.
La persona che mi ha salvato 
dall'inferno che era la mia vita.
Ele me resgatou do buraco 
que era a minha vida.
Он вытащил меня c самого
дна вонючего болота.