“Kazuya is always helping us, right? I don't mind pretending to be his girlfriend.” My best friend asks us to fool his marriage-obsessed mother. Bored by her uneventful life as a housewife, my wife eagerly embraces the plan, leaving me little choice but to agree. Days later, she meets Kazuya's mother for the first time. I expect her home after dinner, but his mother has also booked a hotel, making it difficult to leave. After the last train, my wife messages that she will slip away and take a taxi home—then suddenly stops replying...