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.Seo Yoon Seul, who's lived a perfect life so far, becomes a wreck when he starts having nightmares of a boy whom he coldly rejected when he was a student. The nightmares get even worse when he reunites with Kang Joon. Following his advice on becomin

This is a world where evil creatures are gradually rampaging. However, the evil creatures are strong, they all disappear after this mental hospital, and even without dignity, they are reduced to ingredients and pets. This is the green mountain mental