Demon Time

At the base of the sheer cliff, Karasuma doubts the class can reach the unguarded upper entrance, but the students begin climbing on their own, having trained on the mountain behind their school. Moved by their resolve, he takes charge as mission commander and hauls both Korosensei and Irina up with him. Inside, the heavily guarded lobby blocks the way until Irina strolls out posing as a tipsy pianist, seducing the guards' attention away and buying the class twenty minutes to slip past unseen, a display Karasuma calls the mark of a true infiltrator.

Posing as the hotel's spoiled young guests, the students press upward through thinner security.

When Terasaka and Muramatsu charge ahead recklessly, a passing guest releases a cloud of gas, and Karasuma shoves the boys clear but inhales a trace himself. Fuwa recognizes the man as the butler who served their welcome drinks and deduces he spiked them, since the drinks were the only thing every student shared. Revealed as a hired killer, the man moves to finish the fading Karasuma, who knocks him out cold before the gas takes hold, leaving the students to fend for themselves with all their teachers down.

Higher up, the group meets a lone hitman who cracks a glass window with his bare hand and craves a real challenge. With Karasuma incapacitated, the man loses interest until Karma smashes his radio and goads him into a duel. Sensing the boy has grown humbler and sharper since the exams, Korosensei watches as Karma and the killer square off.

The episode adapts Chapters 61 through 64 and first aired in Japan on May 29, 2015. Okajima appears in a flashback, and the hired assassins Smog, Grip, and Gastro feature among the hotel's defenders.