A Forbidden Relationship with Her Older Sister

Kyoichi injures his wrist during club activities and must spend the summer resting at home. His girlfriend Chisa is away on a trip, leaving him frustrated by how difficult even ordinary daily tasks have become.

Chisa asks her older sister Hinami to visit and provide temporary care. Hinami helps with meals and washing, but the closeness quickly creates an awkward tension that neither of them expected.

The two begin debating where the boundary of betrayal actually lies. Their conversation and choices gradually test the promise that the relationship will remain limited.

This AI translated adult visual novel uses a straightforward ADV format and is adapted for smooth play on Android. It suits players interested in compact summer stories, relationship tension, and choice driven dialogue.