Gogo no Kouchou: Junai Mellow yori
Based on the manga Junai Mellow by Jun.
Yayoi is a sexually frustrated housewife with a workaholic husband whom she loves, but lately he hasn't been paying her the attention she needs. She begins to fantasize frequently. A coincidental encounter with a nice young man from the neighborhood who has a crush on her is too much for her self-control.