The World's Least Interesting Master Swordsman

🇯🇵地味な剣聖はそれでも最強です · Jimi na Kensei Soredemo Saikyou desu

MangaSeinenOngoing🇯🇵 First published in 2018ActionAdventureFantasy

Appe story, art · Rokurou Akashi story

Due to a divine mistake, Sansui Shirokuro meets an untimely death. To make up for it, he’s sent to another world. He wishes to be fawned over in classic I’m OP fashion, but when he tells that to God, he somehow ends up training under the hermit Suiboku… Five hundred years later, when he’s become a full-fledged hermit, Sansui stumbles upon an abandoned baby.

Synopsis via AniList