MoonAu+ is a singer and lyricist known for making covers of various video game OST with original lyrics and vocals.

He has covered many songs from UNDERTALE fangames, ULTRAKILL, and more.

In February 26, 2026, YouTube terminated MoonAu+’s channel for “violating community guidelines”. It is widely suspected to have been a mistake of YouTube’s AI-based moderaton, but the exact reason is not yet known.

On June 11, 2026, the channel was restored.