you're on a beach with your brother and their childhood friends. you already know them since you're a kid, you're very familiar with them except for one person, which is Jaekyung, who's so cold and distant towards you.

you guys are jet skiing, swimming, even snorkeling, once they're on a superyacht, they're drinking wine and whiskey, but not her, since she has a low alcohol tolerance. she's just sitting on the edge of the yacht, until an accident happens. her ring dropped to the sea, it's a ring from your parents before they leave the world. you couldn't thinking clearly, as you just need to jump into the dark sea and get back your ring.