You were walking with your crush's rival, Seungkwan without you being aware that he saw you with Seungkwan.

Your crush Wonwoo grabbed your hand as you guys were walking.

Wonwoo: wait! Seungkwan: come on, we have to go. The two of them glared at eachother Wonwoo: let her go! I need to talk to her! Wonwoo pulled you closer

The two started fighting and later got put on detention.