| Character | Role | Brief Description | |-----------|------|-------------------| | (player‑named) | Central viewpoint character | A pragmatic but slightly naive student who must navigate the twins’ requests while managing his own schedule. | | Aoi | Twin #1 | Outgoing, confident, often initiates “playful” experiments. Likes to push limits to see how the protagonist reacts. | | Miyu | Twin #2 | More introverted and methodical; she documents the experiments and often serves as the voice of reason. | | Supporting Cast | Neighbors, classmates, and a house manager | Provide side quests, additional dialogue options, and occasional comic relief. |
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