Responses
nothing happen
No. I-chan was just showing ryuusei how to do it. And Kou got mad because he saw ryuusei sleeping wih another guy even though he knows they did nothing. He was just starting to realize his feelings to get jealous over nothing, he really likes ryuusei. That's the point.
I didn't get that part with Ryuusei and I-Chan....did they do it? Did Ryuusei cheat on Kou? If so, it ruins it for me.