キルアオ

Juzo Ogami, a 41-year-old divorced hitman with a daughter, transforms into a middle schooler after being stung by a mysterious bioweapon. Under the alias Ichiro Ogi, he enrolls in a school to maintain his cover while working for an assassin organization. He befriends Noren Mitsuoka, a popular and cunning classmate who hides her calculating nature behind a charming facade. Juzo navigates school life, from mundane classes to quirky club activities, while secretly handling assassin missions. His interactions with Noren and other students, like the bold Tenma, spark comedic chaos and unexpected bonds as he balances his dual life. (Unreviewed summary by Grok 3)