A summer overnight stay at a traditional old house, filled with the sounds of fireworks, the sweetness of watermelon, and the joy of water play—a special time where hearts and bodies gradually let go. Amid the lively summer atmosphere, things unexpectedly escalate when a couple of friends step out for supplies. Already excited, they don't even notice someone's on the other side of the sliding door, recklessly messing up their yukatas as they charge ahead. As these raw, unfiltered summer memories unfold, moans echo from right next door, turning the days into something dreamlike.