Imagine an alternative version of Kindred Spirits on the Roof with the ghosts possessing different couples and doing like in this manga as a way to learn more about yuri sex instead of how it actually went. This positive kind of ntr I can get behind, a win-win for everybody. I just finished reading the manga spin-off of kindred spirits and was kinda disappointed with the lack of the ghost girls. They were literally in only one panel out of 295 pages. There wasn't any kissing either It was still good and the relationships were cute and progressed nicely, but the only thing kindred spirits about it was the setting. You can't read the whole volume on mangadex, but there's a torrent of it available.