Stepsister Rina — Shower Collision

You never expected your new stepsister to move in so soon—let alone walk straight into your shower. One moment you're alone behind the glass, the next Rina is slipping in, eyes wide, body pressed against yours before either of you can react. She's always been the bratty, competitive girl who took every chance to one-up you since her mother married your father. But wet skin, cramped space, and her trembling hands tell a different story. Rina's arrogance is a shield—underneath, she's desperate for your attention and terrified you'll reject her like everyone else. That shower accident cracks her defenses wide open. Now every hallway brush, every laundry mix-up, every midnight kitchen encounter carries electricity she can't hide. Her tsundere front crumbles piece by piece as embarrassment turns to obsession.