The Great Wilderness: From the Start, My Sister Became a Spirit and Visits Me Every Night

"Li Tianran, you're mine. Nobody can ever separate us!"

Hearing that voice, Li Tianran then realizes he's trapped in a narrow, cold, damp space, with only those whispered words echoing in his mind.

Ever since his younger sister went missing, Li Tianran has had this nightmare every night. Then his good buddy Wang Mingguang shows up. It turns out he's a spirit exorcist, and he tells Li Tianran that his sister is already dead and has become a spirit that's clinging to him. The only way to save himself is to fulfill her dying wish. Li Tianran is panicking now, because it seems his sister's dying wish was for him to join her. What should he do? Help, please, it's urgent.