– The sister’s sleeping expression changes based on your actions. Neglect her (skip meds, let filth pile up), and her face grows gaunt, lips pulling back in a silent grimace. Care for her meticulously, and she might… almost smile. The game never confirms if she’s aware.

The gameplay revolves around balancing several key metrics and influencing Mayu's behavior through daily interactions.

: Progression is tied to her stats. New interactions and clothing options (like her underwear) become available as the meters fill. Branching Choices