Strong Main Character Defeats Evil Demon, Shikkakumon no Saikyou Kenja

Anime: Shikkakumon no Saikyou Kenja | The Strongest Sage of Disqualified Crest | The Strongest Sage With The Weakest Crest | Shikkakumon no Saikyokenja | 失格紋

Is there any anime/manga where the MC with a dark past (assassin, soldier, etc.) meets people with ordinary lives and tries to fit in, but past conflicts come back to the MC? (

Manga Like The Misfit of Demon King Academy

Shikkaku Mon no Saikyou Kenja~ Sekai Saikyou no Kenja ga Sarani Tsuyoku Naru Tameni Tenseishimashita~ - Novel Updates

Shikkakumon no Saikyou Kenja - Episode 10 discussion : r/anime

September 2019 Light Novel Release in Japan – Teaser Translations

Shikkakumon (Manga), Saikyou Kenja Wiki

Manga Like Egret: The Great Sage

Kenja No Mago Chua Tek Ming~*Anime Power*~ !LiVe FoR AnImE, aNiMe FoR LiFe!

Shikkakumon no Saikyou Kenja - Episode 1 discussion : r/anime

What is the manga where MC is weak but acts strong or everyone thinks he is strong (I have already read High School Stormbringer and MX0)? - Quora

Shikkakumon no Saikyou Kenja - Episode 10 discussion : r/anime

Winter 2022 First Impressions #1 – Ariana – Moeronpan