This is a popular visual novel featuring artwork by IshiKei. It is an adult-oriented game (18+) that uses Live2D animation.

A free demo is available on Steam and SteamDB .

If you provide more details, I can help you find specific installation instructions. LOVE³ -Love Cube- on Steam

The complete game is a paid title available on Steam. 2. Ai Otsuka Official Fan Club App "LOVE CUBE"

Provides access to ticket pre-sales, exclusive blogs, Q&A sessions, and live broadcasts, though some content requires a paid membership plan. 3. Love Diary: Cube Matching Game

Players solve puzzles to renovate a mansion and follow a romantic storyline.

For fans of the Japanese artist Ai Otsuka, this is a dedicated mobile application. Available for free on the Google Play Store .

If you are looking for a casual mobile game, this is a match-3 puzzle title focused on home decoration and story progression. Available for free on the Google Play Store .