一個顛覆的愛情故事，改編自日本作家乾胡桃的同名人氣小說，曾被喻為不可能影像化的小說故事，落在《圈套》導演堤幸彦手上，證明改編成電影不是不可能。故事由Side A展開：日本 靜岡縣一對年輕初戀小情人由相識到相戀，温馨甜蜜，可惜後來男的轉到東京工作，二人分隔兩地感情也起變化。輪到SideB： 男的已去到東京工作，公司來了一位新的美女同事，兩人互生好感更開始交往。男的一腳踏兩船，穿梭於靜岡的初戀情人和東京的新歡之間，直至一天，他竟不慎誤將新歡的名字稱乎初戀情人⋯⋯別以為故事就要講完，好戲在後頭，且有驚人結局，絕對是非一般愛情故事。故事背景是八十年代，片中呈現的日本經濟起飛的年代也相當逼真。

In the late 80s in Shizuoka, nerdy college student Suzuki (Matsuda Shota) meets and falls in love with perky dental hygienist Mayuko (former AKB48 member Maeda Atsuko), and their romance changes him for the better. Later, Suzuki moves to Tokyo for work, and the two begin to drift apart as he grows closer with a pretty colleague (Kimura Fumino). Blockbuster filmmaker Tsutsumi Yukihiko’s (20th Century Boys series) adaptation of Inui Kurumi’s bestselling novel may sound like your typical romantic drama about first love and loss but it is actually an intricate mystery, culminating in a final five minutes that redefines everything that came before.