Goei

Childhood friends Seung-Hwan, Do-Hee and Sang-Min continue their cherished friendship even when they entered high school. However, Sang-Min has disappeared due to the appearance of grosteque creatures called Goei (Gui)… As they search for their friend Sang-Min, they found a few secrets… Will Seung-Hwan be able to bring his childhood friend back?

(Source: Naver, translated)