My Stepmom's Daughter is My Ex

Ah, high school—a fresh start after a total disaster in middle school, right? Well, not when your ex-ghost from the past shows up as your stepsibling! I thought this place would be my peaceful escape, but instead, I’m stuck with her everywhere—my house, my classes, you name it. And she’s totally acting like she’s the boss sibling! No way! I might be the younger bro in this weird family mix, but I won’t back down. Sure, we’ll pretend to be cool for the 'rents, but deep down? We’ve seen each other's true selves, and things will never be the same again.