When he finds out your ex wants to get back together with you

Saeyoung:

*starts laughing in a nervous way,not knowing if it's true or just same joke you're making* "Wait,you can't be serious?" *stops laughing and has an a serious expression* "You're serious."

Saeran:

*when he sees you,he puts on a smile but he's feeling uneasy inside* "Should we go on a vacation? It's been a while..." *thinks that he doesn't spend enough time with you*

Jumin:

*he feels guilty and uneasy because he's always busy with work,and not giving you enough attention* "Oppa will start making time for us,so....don't doubt our relationship and leave oppa for your ex,arasso?"

Zen:

*arranges a meeting with your ex,having you attend also* "Don't you see her glow when she's me?" *puts his arms around your shoulder,pulling you closer to him* "Give up or I'll make you give up!" *death glare*

Yoosung:

*scoffs,not giving much though* "I'm Yoosung." *laid back knowing that you would never go back to your ex because you're happy with him*