Mob Psycho 100 Vol 4

Nothing's stronger than the bond - or the rivalry - between brothers!
Mild-mannered Mob has never realized that his younger brother Ritsu, who enjoys all the social success that Mob lacks, nurtures a hidden, desperate envy for the thing Mob possesses that he doesn't--Mob's psychic superpowers. But when Ritsu's own powers awaken at long last, the story turns towards a shocking new direction!
From the creator of One-Punch Man!