Huh, didn't know there were MORE romantic horror-comedies involving ghost girlfriends besides "My Roommate Isn't From This World".

It's also piqued my curiosity about how many other romantic horror-comedy manga there actually are, or even just horror comedies in general. I really like the one involving an immortal gym teacher obliviously reforming horror monsters and villains.

The one with the GYm teacher is the best one.

I recomend these
https://mangadex.org/title/47332/the-strongest-haunted-house-and-the-guy-with-no-spiritual-sense
https://mangadex.org/title/55820/ghost-stories (not romance, but pure gold)
https://mangadex.org/title/50740/there-s-a-ghost-behind-the-gyaru
https://mangadex.org/title/41655/ikenai-kanojo-no-otetsudai (got axed to soon)
https://mangadex.org/title/36256/iwakutsuki-bukken-no-yakuro-san
https://mangadex.org/title/49944/the-witch-and-great-devil (does satan count as a ghost)
https://mangadex.org/title/49304/apartment-ghost

ANd these are just the ones from my following list.