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.
That president of yours 
didn't give you peace.
رئيسك ذاك لم يمنحك السّلام
Dein Chef hat dir nicht
deine Ruhe gegeben,
Tu jefe no te otorgó calma,
Tu jefe no te otorgó calma,
Tu te sens pas en sécurité
grâce à ton directeur,
Il tuo Presidente non ti dà la pace che credi.
Esse seu presidente não lhe deu paz.
Твой директор не подарил
тебе душевное спокойствие,