Yûwaku tsuma monogatari: Nureta hitosashi yubi

誘惑妻物語 濡れた人差し指 (original title)

Synopsis

Keiko, the wife of a university professor, was living a somewhat dissatisfied life. However, when she started working part-time at a restaurant run by a man named Naoki, whom she met by chance, her life gradually began to change.