My Ex Just Developed a Delusion

Damin is dumped by his lover and childhood friend. They became lovers, even giving up their friendship, but the ending is truly miserable. Just as he was thinking of ending their cohabitation since they broke up anyway, his ex-boyfriend, Eunhyung, who had cruelly dumped him just moments ago, clings to him, crying. "Damin-ah…. Hong Damin." “…? Seo Eunhyung?” "I missed you." The cold eyes he had shown just a moment ago are gone, and he sheds tears, even shouting his love. He even says he came from the future…. 'What do you call this…. Delusional disorder? Ah, delusion.' It seems my childhood friend and now worse-than-stranger ex-boyfriend, Seo Eunhyung, has a delusional disorder. ...