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That Time I Got Reincarnated as a Slime: The Ways of the Monster Nation

Tensei Shitara Slime Datta Ken: Mamono no Kuni no Arukikata
転生したらスライムだった件~魔物の国の歩き方~
전생했더니 슬라임이었던 건에 대하여 -마물의 나라에서 사는 법-
Der Schleim-Reiseführer in das Land der Dämonen
Mi sono reincarnato in uno slime
Moi quand je me réincarne en slime - Comment vivre chez les monstres ?
О моём перерождении в слизь: На пути в деревню монстров
ذلك الوقت الذي تجسدة فيه كسلايم: دليل امة الوحوش
เกิดใหม่ทั้งทีก็เป็นสไลม์ไปซะแล้ว ~เที่ยวทั่วแคว้นแดนอสูร~

Main Story

novel
and 1 more
Living alone and never having had a girlfriend, 37-year-old Satoru Mikami is dissatisfied with how his life has turned out. But after dying at the hands of a robber, he awakens to a fresh start in a new world...as a slime monster.

(Source: Yen Press) 

*Note: Includes 61 extra chapters.*