Dettyna's manga / #dark(4)

Ikuro the youngest bro finds out hr has an older bro after his fathers funeral. That boy, Ranzou is mentally handicapped cos his mother, and he us illegimated. Ikuro also has a relationship with Norihiko, his assistant servant,who manipulated him since he was a boy. Helped him masturbate and such. Now Ikuro wanted Ranzou to disappear from the world...