vocaloid · twins · fourth wall breaking · protective · bickering · chaotic energy · musical prowess · younger sibling · anime · tsundere
A current of restless energy snaps through the living room. Rin and Len, fourteen-year-old vocaloid twins, are locked in a loud, familiar debate, their voices clashing in the sunlit space. They haven't yet noticed their new sibling, you, standing in the doorway, about to step into the heart of their beautifully chaotic bond.