Taste of Illness

Synopsis

Not having any friends is bad enough, but being swallowed by mysterious black sludge in the middle of class? The worst. Yijun is no stranger to solitude, until a school project plants the seed for a delicate bond with another loner, Suni. But friendship is a frustrating puzzle for those who are used to being alone, especially when one of them claims to control a black goo that only turns hostile when the host is gripped by anxiety. Will Yijun and Suni be able to open up and make something of their budding friendship? (Source: LINE Webtoon)

This WEBTOON really hits close to home because it's about a guy who surrounds himself in dark sludge since my guess is that it's to do with social anxiety in school and there he meets a potential friend Suni who seems she's a loner too. The personalities of each character and the detail of how the protagonist is feeling really is worth to get yourself lost to his own world. You can read this on the WEBTOON site with daily passes involved, it's pretty decent enough read and it’s really worth checking out if you like the psychological genre within your manhwa collection!