Chapter 158

As lessons wrap up, Okano asks Maehara to head home together and he agrees. Catching Korosensei spying on the pair, he steers her toward karaoke, but she soon realizes she was only bait for a failed ambush on their teacher. Enraged, she boots him with both feet and marches off. Korosensei blames the whole mess on poor communication and tasks Maehara with winning her back and coaxing chocolate from her, or else be branded a playboy on his report card.

The following day the class watches Maehara fumble every attempt to draw a treat from Okano. When Kataoka asks their teacher to intervene, Korosensei insists that a genuine assassin masters every subject, romance included.

By lunch Okano remains unforgiving, so Maehara resorts to reciting a list of unflattering traits he has noticed in her. She furiously roundhouse-kicks her anti-sensei blade at his face, only to find it has been swapped for a chocolate replica. He explains that he knows her better than anyone and keeps listing her qualities, and though her anger fades she kicks him again out of sheer embarrassment. Nearby, Kayano slips a wrapped chocolate from her desk, and Nakamura and Karma catch her at it, needling her over its intended recipient.

Okano turns on Maehara after learning she was used to trap Korosensei, who then challenges Maehara to earn her chocolate. Maehara's blunt flattery backfires until her thrown weapon turns out to be chocolate. Karma and Nakamura notice Kayano hiding a gift and begin teasing her.

Valentine's Time is the one hundred fifty-eighth chapter and spans twenty pages within Volume 18. It follows Enemy Time and precedes a second Valentine's installment, setting up the romantic subplot around Kayano that continues in the next chapter.