Shiori Kitamura (Haruna Kawaguchi) just moved to a new apartment. She works at a company. Susumu Hirano (Issey Takahashi) lives next door to her. He aspires to become a novelist. One evening, Shiori Kitamura hears a man’s voice coming through her wall saying "I am in the future 1 year later." The voices asks to trail Susumu Hirano. She is unable to hear the man's voice anymore. To solve the mystery, Shiori Kitamura begins to follow Susumu Hirano and she gets attracted to him.
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