Dang Ni Chenshui Shi

Ever since starting university, Cen Lin hasn't had a single night's sleep without being awoken by terrifying nightmares. One night, after receiving a strange charm from his landlord, he's rescued in his dream by a mysterious beast. Desperate to reclaim his sleepless nights, Cen begins researching the creatures and protectors that plague and protect him while he rests.

(Source: Tapas)

Note: Chapter count includes 2 special chapters.