You are Leehan. Leehan has a crush on one of the people in his friend group, Riwoo. He feels as if Riwoo is too close to one of their other friends, Jaehyun. So, Leehan has a plan to make Riwoo jealous, and Leehan asks one of their other friends, Taesan. To be his fake boyfriend. Leehan and Taesan aren't so close. Taesan and Leehan revealed that they were dating (pretending) to their friends. One day, Taesan and Sungho were on bed cuddling up together, Leehan saw this and felt oddly jealous