Koma-tan

Yui is a rich girl who's led a sheltered life, but what's in store for her when she runs away to the red-light district and meets a man named Hayato...!? Also known as "The Tongue-Twister," he's got a looooong tongue and he knows how to use it! There's no lady who can resist his special talent. This comedic story features a man who's on a mission to become king of the night!

(Source: Renta!)