Boushoku no Shinryakusha

A peaceful day as usual, the person who came to our class... Was this the start of a human extinction scenario?

Childhood friends, Hamaji and Toriko, continue to lead a peaceful life. Even the serial murders that occur in the city are rumors to avoid boredom. Mizuki, a transfer student who came across such a situation. As soon as he meets her, Hamaji's boring and peaceful daily life collapses in the blink of an eye.

(Source: Fairbell, translated)