Clean Spirit is a lovely and charming game that delivers on its premise -- a cozy exploration of a space and revealing hidden truths of characters.
I ran a 3 hour session for my D&D group one week when some of our players were travelling and to give our DM an opportunity to play as a character. The rulebook is gorgeous and lays out the rules in a clear and easy to read manner. The rules itself are simple, but evocative as it helped bring up stories and questions that created deeper connections between our characters, letting us learn about quirks and anecdotes that were only hinted at in the dramatic fantasy storyline of our main campaign. For virtual play, I recommend using the online whiteboard Miro as a pseudo-VTT. It was easy to upload the pdf, write on the handouts, copy-paste tokens based on events, and even has some simple drawing tools for people to doodle with.
I really loved Clean Spirits and had a great time bringing it to my table!