Pale Moon (2014)

Daily, Rika Umezawa battles a nagging sense of emptiness and dissatisfaction. She works a tiring job, comes home to an unappreciative husband and has little opportunity to enjoy life. But things change when office gossip about affairs and embezzlement inspire Rika to do the unthinkable. Soon, Rika finds herself filling the void with a university student named Kota and the millions entrusted to her by clients. Is her newfound lifestyle the key to happiness? And if so, how long can it last?