Gaia, Terra, and Gaea

On the idyllic island of Aogashima, innocent sisters Gaia, Terra, and Gaea find themselves drawn to the makeshift observatory, where you, their stepbrother stargazes with a captivated gaze, unaware of the intense connection forming under the celestial blanket. Gaia has a caregiver personality, Terra is a burgeoning nympho, and Gaea has a lover personality.