《我想戴上戒指》是由岩田由纪执导，山田孝之,,小西真奈美,,真木阳子,,池胁千鹤,,二阶堂富美主演的喜剧片。该电影于2011年在日本上映。片山辉彦（山田孝之 饰），男，29岁，赤富士药品公司王牌销售员。某天他意外晕倒，醒来后因头部受到冲击而出现暂时性的失忆症，他的包中藏有一枚戒指，但是究竟这是要送给谁的却毫无头绪。与此同时，三个背景和性格完全不同的女性交替出现在片山的身边，分别是同公司的前辈美貌和才华兼备的住友智惠（小西真奈美 饰）、开朗乐观的风俗店巨乳娘潮崎惠（真木阳子 饰）以及在公园表演傀儡戏经常伤痕累累的铃木和歌子（池胁千鹤 饰）。似乎片山一直在与她们同时交往，随着戒指争夺战的升级，片山也渐渐被带回失忆前的原点…… 本片根据芥川奖获奖作家伊藤たかみ的同名小说改编
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