Which did you watch? Both episodes explained.
Ep .1
The Chinese gov. lost their cyborg
Arisa fell from the sky and landed Koutarou's restaurant
The Chinese send Ayase to get the Fire Bee
The Shinichirou's sister Kotomi is mistaken for the Fire Bee
Arisa is the Fire Bee
There is also a ridiculous amount of Ramune advertising in this.
Ep .2
Ayase is getting punished for not bringing back Fire bee.
What's obviously the Chinese is called the National Army.
Koutarou and Morizaki are outcasts from the National Army
Ayase is being blackmailed being forced to find Fire Bee
Saya is the new help after Ayase disappears.
They manage to get a carnival trip in with only two episodes.
Koutarou, Morizaki and Ryunosaki made the Electric dolls.
Ryunosaki (Head of National army) used the dolls for his personal gain.
Koutarou disappeared.
Morizaki (Old man) is the owner of the restaurant.
Shinichirou and Kotomi run the place for him.
Ayase and Saya get kidnapped. The crew goes to rescue them.
Arisa realizes she is a weapon.
(It's got old Recycled Toei Dragonball sound effects in it)
Ryunosaki gets away in a zeppelin
Arisa pursues by sprouting wings (the very thing Koutarou was looking for)
Arisa obliterates the zeppelin.
Arisa shows back up at the restaurant.
End.
When they show storyboards at the end, that means it's over. They told what the could, with the budget they had. It was a good story.
There wasn't hentai of Arisa until after the credits rolled. The title character. And even that was a dream.
Advertising still worked. I went and bought some Ramune.
The posters around here aren't experienced when is comes to hentai anime. Ask away.