Warning: Smut, BDSM, rough sex
Disclaimer: I don't own them.
Summary: As soon as he sees the black collar around HeeChul's neck, SiWon already knows what is going to happen in the evening.
AN: For rawrrrstar because she wanted rough sex...well, okay, I know you wanted something different and I tried, but this came out. Even though it's not what you wanted, I still think it's good. At least I'm satisfied with it :) Also, this is for all the other SiChul fans. I hope you enjoy and comment if you liked it ^^
'HeeChul-ah, I want you to knock on my room door in exactly thirty minutes,' SiWon announced sternly, before leaving the living room, the other members watching the scenery in front of them in surprise, because it was unusual for someone to be that impolite to their hyung. No one dared to question SiWon's behavior though after HeeChul just threw another knowing grin at him, obviously tolerating this.