Very kinky and twisted yaoi manga

Have you ever read a kinky or extremely twisted yaoi manga? Cuz I have and I loved it ヾ(☆▽☆).

My favourite twisted artist is parasio, those guys CAN DRAW some sick ass plots. And I for one, do not judge, I am an open-minded person and will go for twisted any day (⌒▽⌒).

What was the first "weird" yaoi manga you read?