Jae Hyun takes the initiative to spend time with Seung Jun when he's depressed, and the relationship between the two of them develops further.

Joo Won does whatever it takes in order to force Seung Jun to come back to his side.

Jae Hyun manages to get to Seung Jun in the nick of time to protect him from Joo Won, but it's because of this that the two of them end their relationship.