11 titles recommended if you like In/Spectre
Yuuna and the Haunted Hot Springs
Fushigi Yugi: The Mysterious Play
The Legendary Hero Is Dead!
I'm the Villainess, So I'm Taming the Final Boss
Vermeil in Gold
Natsume's Book of Friends
Undead Unluck
Toilet-Bound Hanako-kun
Kemono Jihen
Twin Star Exorcists
Handyman Saitou in Another World