(spoilers) there is no doubt what this show is, it’s your seasonal trash, with all the ecchi tropes thrown in as our Main character has to live in a haunted room, in a temple with an all-female cast of characters who are not related by blood and might not be huma. Best of all the ghost has a great plot and development to her, I wouldn't call it harem as it is a pure love story between a young man and a dead high schooler who has regrets in her life and is therefore unable to pass on into heaven. Set in a hotel it’s got allthe typical tropes you'd expect that come along with having a hot spring located within close proximity.

I'd recommend this show if:
A. you like trash
B. you really love trash
C. you love trash and ghosts with great plot