Rainbow_Flow's Favorite

I'm looking for a yaoi manga about a guy who witnessed his cute friend getting raped by their coach when they were younger, and blames himself for it. Later, they meet again in high school, and his friend shows up, looking much flashier. He later witnesses his friend raping one of his other friends, and he then lets his friend rape him as revenge. It turned out though that his friend was, of course, in love with him all along.