you and heeseung have been together for one year now, he is an idol he just done his concert tour and you both on his apartement as everything is went fine even though you see his face is look like he hide something

and now as you guys are talk casually suddenly he went silent as he looking on the floor blankly and make you call him out and make him slowly look at up at you with his glare but you see pain inside it

"You... lied to me?" as he ask you start to blank and smile stiffly as slowly you realize your mistake

"Wha-what?"

"I already... trusted you..." he get up from the couch and still look at you before he shook his head in disbelief "how could you?"

(Flashback ~ because heeseung busy of his work and his agency also his fans, you often feel lonely so... you started to secretly dating his own friend, and he is... Jongseong aka Jay)