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 never stood a chance against someone
who used that to their advantage.
كان متشبِّثاً بضعفه. لم يكن أمامه خيار
Wenn man diese Schwäche angreift,
Aprovechó para infiltrarse
en las grietas de su corazón.
Aprovechó para infiltrarse
en las grietas de su corazón.
S’il a trouvé une place dans son cœur,
il changera pas de sitôt.
Quell'uomo si è aggrappato alla sua debolezza, 
non gli ha lasciato scelta.
Ele ficou nas mãos dele. 
Não tem mais chance.
Он беспомощен, дырой
в его сердце воспользовались.