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Based on a manga by Chuusonji Yutsuko, it tells the story of OL (office lady) extraordinaire and golf fanatic Oyamada Non. She is 23 and works at Major Products in Tokyo's commercial district, Marunouchi. Between bossing her bosses and managing her managers, she finds time to golf, shop, party, and pursue the important things in life, i.e., marriageable men.
An aimless college student comes upon the aftermath of a murder scene one night, and without thinking, grabs the titular weapon. He takes it home and keeps it safely hidden away, but curiosity gradually begins to consume him.
