A week have yet left with the usual days. Jimin still getting along with Taehyung whilst Jungkook trying to be his cold self. Sometimes, Jungkook were caught staring at Jimin by Taehyung or Jimin himself. But quickly, he turn away the gaze. 

"What's with him? A day he kiss me and the next day acted as if there's nothing? Jeon Jungkook, are you trying to play with my heart?" Jimin whisper under his breath. He stare at Jungkook who laid his head on the table. He gritted his teeth. Jimin gaze aborted as Krystal went to him. 

"Yahh, Jungkookie.. We need to talk." Krystal which makes the class 'woo'-ing at them as if they're a couple. Jungkook stare at her. "What do you want?" Krystal frown. "I said we need to talk." Krystal said again as he signalling the word 'we' as she wanted to talk in private. Jungkook turn to look at Jimin who somehow look away from them with an annoying face. Jungkook sighed, "Fine.. Where do you wanna talk at?" Jungkook asked her and she replied, "Follow me." Sighing hard, Jungkook went to follow her. 

"Tch.. Trust, what!? In the end you still go with her too.. Find, where do you wanna talk at? Blablablaa~ " Jimin said, extremely annoyed. He imitates Jungkook's voice. Exasperated. 

..

"What is it that you want to talk about? Hurry, I don't have much time to listen to your rants" Jungkook said to Krystal as they arrived at the secluded place. "I have a deal for you.." She said which doesn't catch Jungkook's attention at all. "I've heard from my Dad that the man you're protecting me from trying to make move on my birthday.. Thus, I want you to protect on that day." "So, what's the big deal about that? It's my mission to protect you tho.." Jungkook said, half rolling eyes. "Here's the deal.." She get serious. "On that day, when everyone gathers which means the man will be there too, I want you to act.. " "Act? What do you mean by that?" Asked Jungkook, confused. "I want you to be my fake boyfriend.." "Bullsh*t. Why would I?" Quickly, Jungkook objected her ideas of being her fake boyfriend. "Look, I know it sounds ridiculous to you but a few days ago, whilst eavesdropping my father, I heard him talking from the phone with man. The man said that, for as long as your daughter have no one who suited her best, by means a partner, for as long as that he'll make sure I'll be his.." Krystal explained. "Isn't it beneficial for both of us? If we did this role play, your mission will be successful, whilst I can have my freedom again.. Right?" Krystal try to negotiate with Jungkook regarding the situation. If he said yes, he'll for sure know that he'll ruin his whatever relationship he may have with Jimin and if he said no, his mission will end up as a failure. Jungkook scratches his head. 'Damnnnn! What should I do?' Jungkook took his time to think carefully. 

...

24th October, Krystal's birthday. Everyone from the school joined in the party. Every year, she celebrated it. Knowing with her rich family, Krystal always get what she wishes for moreover on her birthday. Jimin always avoided coming to the party but this time it's excluded. Taehyung forced him to come over and to his surprised, so does Jungkook. 

The theme of the party is masquerade, thus everyone wearing elegant