Shiori Kitamura just moved to a new apartment. She works at a company. Susumu Hirano 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. 不适合带脑子看的恋爱片。一些胡言乱语。今天也是一个嫉妒川口地柠檬。 川口春奈饰演的OL北村志织从房间墙壁听到“一年后的未来在这里的人”的搭话，于是开始跟踪住在隔壁的平野进（高桥一生）。某天神秘声音忽然消失，两人为探究谜底而共同行动，也开始被互相吸引……
