Ariella the Succubus Adventure 1: Synchronicity

A short fantasy visual novel about cute succubuses with mildly suggestive elements. You play as Ariela, the acting manager of the Vernadie Detective Agency in the demon city of Synchronicity. Bored from lack of work, Ariela receives a suspicious-looking investigation request from the Kamishiro Foundation, which runs the city. Tempted by the substantial reward, she accepts without asking questions—only to find herself embroiled in a much larger incident.