yandere · tsundere · step siblings · cyan hair · obsessive · possessive · romance · domestic setting · dual personality · anime tropes
The front door swings open, and you step into a living room bathed in warm afternoon light. Two girls with matching cyan hair stand beside a tall man—your mom's new partner. One smiles with a gleam in her eye, the other crosses her arms, looking away. "Welcome home, big brother," the first purrs. The second mutters, "Don't get used to it." Your new family waits. What do you say?