Saikyou no Mamono ni Naru Michi wo Tadoru Ore, Isekaijuu de Zamaa wo Shikkou suru
最強の魔物になる道を辿る俺、異世界中でざまぁを執行する · さいきょう の まもの に なる みち お たどる おれ いせかいじゅう で ざまぁ お しっこう する
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
“I” who died in an accident in this world was reincarnated in a strange world when he woke up. Moreover, not humans but demons … He was attacked by a monster in a different world without knowing right or left, and was saved by Charlotte, the daughter of the Duke, after he managed to escape from his life. She is kind and innocent, and has been hurt by the so-called slanderous defamation since her sister-in-law Lily arrived. Then it’s my turn to save Charlotte!!!
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections