I'm Not Mentally Ill [Or Maybe You Are]

A Comedy Disguised as a Horror Story

I can't remember the male or female lead's names. The cannon-fodder character is a woman named Jia Youshan. The man might be called something like Liangxin. There's a cute female supporting character whose name has something like Shuangshuang in it. They go through lots of different settings: the Cat-Faced Granny, the Saw Killer, the Old Corpse in the Mountain Village, Sadako, Silent Hill, and so on.