Quick Wear: I, who played the supporting actor, got stuck with the protagonist

Bai Yichen is bound by a system called Xiao Hei Xin, and his task is to play various male supporting roles and be the love catalyst for the protagonist. He always keeps in mind the four rules of male supporting roles. "I comfort the protagonist when he quarrels, I cry when he is in pain, I retreat when he is in love, and I am heartbroken when he is drunk." Bai Yichen always thinks that he has no problem playing the role, but why has the male protagonist become so weird! ? ... World 1: My gentle and sick brother The male protagonist takes out two clothes of the same color but different styles. "Achen, how about these two?" Bai Yichen gave a thumbs up: "You have good taste!" The legendary brother costume is finally his turn. Because his identity is the protagonist...