This is Mai-Chan's Daily Life. Definitely NOT a good manga. It involves a girl named Mai-Chan who can literally regenerate after every injury no matter how severe they are. She's constantly murdered, raped, and cannibalized by customers only to come back and continue her un-ending torment.

How fucked up does a person have to be to make shit like this and think it's decent?! Even David Firth would be horrified by this! :(