Junwoo, a hikikomori, passes his days alone, nestled within the darkness of his room that protects him from the outside world. The one strand of light capable of piercing his world is Hanbit, his neighbor and love interest. But when Hanbit leaves to study abroad, Junwoo is forced to take on a roommate to make ends meet. Could this break to his routine be the very thing that Junwoo needs to free himself of his darkness?
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 becoming a good person to avoid nightmares, Yoon Seul approaches him to win his favor.
Tenma has been stalking Uno on Instagram for the last 5 years and knows everything about him: a shopaholic, foodie, animal-lover and, above all, a kind man. Just watching Uno's stories every day fills Tenma with contentment—until a new girlfriend comes into the picture and makes him question everything that he thought he knew about Uno. Then, out of the blue, a heartbroken Tenma gets the shock of his life when Uno replies to one of his stories for the very first time.
Plagued by nightmares of his old hometown, Yuuma Kurose, a lonely boy with the ability to see ghosts, feels inexplicably drawn back to the place from his dreams. There, he stumbles upon Kaito Kiriyama, a boy shrouded by terrifying spirits. With a serious look in his eyes, Kaito vows he'll protect Yuuma. But the moment their skin makes contact, the spirits surrounding Kaito started to possess Yuuma!
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