He had known her more than half of his life. Maybe because they've been together for so long, Yunho can practically read her mind. 

Whether she's happy, sad, hurt or overwhelmed with feelings, it will always be him, readily by her side. 

Yet, it doesn't mean everything runs smooth for her. In fact, Yunho uses that advantage to make fun of BoA, by having her lose several bets and make her suffer each embarrassing punishments that couples with it. 

Who would have suspected though, that these little games would eventually stir their friendship into something neither of them have even dared cross.

And that the game would someday have to end. 

"I swear to god, I am never gonna play this game with you. Never again…"