A human knight became a Behemoth class monster (S rank) in a dungeon. Except he looks like... a cute kitten? After being deadly wounded, he was saved by a beautiful elf and decided to become her loyal knight.
Ecchi (her boobs are anatomically too big) harem (kitten are lady killer) but why am I enjoying this?!??... That lady... she's definitely waiting for him to be an adult...
That kitten can be scared for his chastity xD
S-Rank Monster no Behemoth Dakedo, Neko to Machigawarete Erufu Musume no Kishi (Pet) Toshite Kurashitemasu