A strange android girl falls from the sky and crash-lands into Shinichirou's cafe, causing her to register him as her new master. Helping with chores isn't Arisa's niche, but she manages to fit in with his sister, Kotomi, until a new girl shows up looking for Fire Bee. Through a series of sexual encounters, Arisa is found out to be the weapon Fire Bee Shinichirou's father was working on before he disappeared. Now the military is desperate to get her back at any cost.

What is a good romance anime with a good English dub?

Asterisk War An anime about students and fighters who compete in a festa (tournament).
The theme gets progressively dark and more meaningful as you watch. - In Another World With My Smartphone Fantasy/harem series about a teenager who’s accidentally killed by God and brought back to life in a separate world. The theme is pure ridiculousness. - Ah My Goddess Nice dub with a set of gentle main characters, and a warm romantic tone. - Nozaki Kun It’s amazing how few people recommend this anime.
Parody/romance comedy with a brilliant dub. - Masamune Kun Revenge 2017 romance anime with one of the best dubs going .
The inner-dialogue is especially funny. - Code Geass Not your traditional romance.
In fact most don’t think of this as a romance… but it is. It’s just layered on top of its militant/mecha theme.
Quality dub. - Elfen Lied Horror/romance between a girl who’s a human experiment, and a regular kid she grew up with by accident. Graphical, violent, and depressing to say the least. - Sword Art Online: Ordinal Scale 2017 Movie set between 2–4 years after the events of SAO. And of course the dub is great like S1 & 2 of SAO. - Little Busters Slice of life anime about teenagers who come together to form their own group, called: Little Busters.