Stranger, Best Friend, Lover?

Changsub and Chorong have been Best of Friends for a long time, but Exo's Suho suddenly comes into Chorong's life.

Suho, Exo's leader who always put everyone before himself.
Will he finally put himself before everything else?

Park Chorong, Apink's leader who always makes wise decision for her team.
Will she still make wise decisions when her heart gets involved?

Lee Changsub, Btob's funny and goofy guy.
Will he take things seriously when it comes to Love?