[Reif]

There was an anime series made with the title "Cinderella Boy" but aside from the similarity in the title there's very little in common with this manga.

The anime series was more of a wacky comedy revolving around two private investigators. The male character being something of a Lupin expy and the other being a buxom blonde heiress socialite.

*Spoiler

After the first episode the two characters wind up inhabiting the same body (without knowing it) which changes form and identity at random times thanks to a mob caused accident and a mad scientist. The series from that part out was filled with a cycle of 'fish out of water' jokes usually involving the male character suddenly finding himself in the middle of high society functions dressed in women's clothing and the female character often finding herself in the middle of some dangerous skullduggery. Wacky hijinks ensue.