From Viz:
Time has passed peacefully for Sakamoto since he left the underworld. He’s running a neighborhood store with his lovely wife and child and has gotten a bit out of shape. But one day a figure from his past pays him a visit with an offer he can’t refuse: return to the assassin world or die!

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Note:
Nominated for Best Print Manga at the Next Manga Awards in 2021 and the 68th Shogakukan Manga Award in the Shounen category in 2022. Won the U-Next Prize in 2021.

Official: Shueisha, Shonen Jump, Shonen Jump Plus, S Manga,
Comico, Piccoma

Official Translation:
Manga Plus (English, Spanish, Thai, Portugese, Indonesian, Russian, French)

Korean Volume (Kakao Page, Mcomics, Naver Series, RIDI), Episode (Kakao Page, Mcomics, Naver Series, RIDI)
French Glénat (Volume, Simulcast, Chapters)
Spanish (Editorial Ivrea Argentina, Editorial Ivrea España)
Chinese, Czech, German, Indonesian, Italian,
Polish, Vietnamese