Exes are the pain in the . Especially your boyfriend's ex. Mingyu learned it the hard way.

He was mad, looking at Wonwoo patting Dooyoon's back with a sad look on his face. Why was that Dooyoon kid even here? When he's not even go to their school.

Wonwoo didn't even acknowledge Mingyu as he led Dooyoon, by taking his hand, out of the hallway.

Mingyu was mad. His boyfriend never got jealous, but he never thought that Wonwoo never cared about his feelings either.  It's always Mingyu who worked for this relationship.

Jeonghan probably right, Wonwoo probably didn't love him anyway.