Yoru no taigo kyoushitsu: Ikumade, gaman shite

Original title: 夜のタイ語教室 いくまで、我慢して

Haruko and Kohei are a couple on the verge of marriage. Haruko attends a Thai language class once a week, where she finds herself the object of her instructor Sato's affections. Eventually, she begins to question the lackluster sex life she shares with Kohei...