大島 美弥子

She has a pleasant and assertive personality, and is disgusted with Yuuki, who is always teasing her.

She and her husband have not been married for a long time, and she secretly relieves her sexual desires through live chat work. Her husband, Takayuki Ooshima, is a major trading company employee who is often away from home on overseas business trips.

She and her sister-in-law Honoka are quite a few years apart in age, so she often takes care of her. Since their husbands are rarely present, the wives inevitably get along well with each other.