The theme of the story is first love. The film depicts a variety of first loves, but the happily ever after begins to take an unsettling turn, and the first love takes a sudden turn in an unexpected direction. The film is a story in which 17 actors were initially chosen, and then cast in roles and written for each actor based on his or her individuality.

Atsuya (30) is going to get married to Chigusa (50), who happens to be the mother of his longtime best friend Tamura (30). Atsuya has invited Tamura to a bar to announce his marriage and ask for his approval. However, after hearing that Atsuya is getting married, Tamura doesn't want him to tell the identity of his bride yet, because he wants to guess her identity himself. As Tamura keeps asking increasingly inappropriate questions, Atsuya finds it harder and harder to tell him they are actually talking about his own mother. In the neighboring table Makishima (37), Atsuya's acquaintance who he told he's marrying the mother of his friend, is watching the conversation with amusement. Makishima is also in the bar to tell about his upcoming new marriage to his ex-wife Naomi (33), who he wants to ask to make a speech at his wedding. When Naomi arrives, it turns out that she's actually Tamura's cousin, so she also knows Chigusa. However...