It was Taisho Era. Morisaki Shinichiro and his little sister-in-law Kotomi manage a cafe that their dead mother ran before she passed away.
Living was calm and quiet in their little city as brother and sister worked hard to earn a source of revenue.
Their father, a top class excellent scientist for the empire, was working on an underground project creating sex androids...
But soon citizens began to direct cold eyes on him, and in the end, he vanished. After that two were living underprivileged lives.
However one day, an accident occurred at the lab which released an android girl into the public.
With a loud noise, the android girl dropped breaking the ceiling of their small café causing her to register Shinichirou as her new master...
At the same time, the armed force is trying to confine and examine Arisa and they have sent Yuri to spy on her.
Yuri is a gentle woman who does not like to cause nuisance, but she will do anything regimented by the military, because they have a hold of her younger sister Nagasi.
Get prepared for a raunchy time now that Arisa the Android is on the loose... observe how her moods influence how she performs.
Beware; Arisa's mood can be easily distorted depending on the mood of her master.
Based on the popular game by Mixwill.
These episodes present Arisa working at the café where Morisaki Shinichirou and Kotomi work.
Helping with chores isn't Arisa's role.
Arisa is found out to be the weapon Fire Bee Shinichirou's father was working on before he disappeared.
At this moment the military is anxious to get her back at any cost.