Odc. 12: Miyu obserwuje dziwne zachowanie Osamu’ego związane z jego powracającymi snami i przysięgą złożoną na mały palec

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A woman named Miyu notices her husband Osamu is acting strangely; he ignores her when she speaks to him, and doesn't eat. One night, before bed, she asks him about it; he has been having a recurring dream where he's married to someone else. She dismisses it, until Osamu starts sleep-talking, loses weight, and leaves the dinner table one night without eating, saying he'd already eaten "on the other side". She begs him to stop thinking about his dreams, as he resides on this side, and he agrees. That night, Osamu apologizes in his sleep, saying he needs to go back to his regular life, much to Miyu's relief. He then apologizes to Miyu for worrying her, and pinky promises to refrain from it in the future. One day, Miyu returns home to find Osamu on the couch with another woman, whom he comforts by assuring her that he made a pinky promise with the shadow of a woman that she can see at night. Miyu then begins to vanish... (Source: Wikipedia)