Hitozuma enkô saito: Yokubô no mamani (2004)

Two years ago, Yukako married Koichi, a man with a child, through an arranged marriage. Her stepson, Yosuke, is dating a high school girl named Kana. Unbeknownst to him, Kana engages in compensated dating via a matchmaking site to earn spending money. One day, Yukako runs into Kana in town, walking with a man named Otaki who looks like an office worker. Kana tells Yukako that Yosuke is the person she cares about most and that she only does compensated dating for extra cash; she then suggests that Yukako try it too...