The lowlife Ranma and the beautiful Rella own a detective agency in Kirin city. He's in it for the money, she's in it for the action. But after a mysterious accident, they are now forced to share... one body?! Now, at the stroke of midnight, only one of the duo gets to use the body, both physically and mentally, causing quite a commotion. With cases to solve and unanswered questions abounding, can the two-in-one-body detective agency solve the greatest mystery of them all: how to return to their former selves?
Birdy Cephon used to be a butt-kicking intergalactic Federation investigator who took down bad guys where they stand; Tsutomu Senkawa used to be a normal student with shy tendencies and a penchant for exploring abandoned houses. However, when Birdy accidentally killed Tsutomu while trying to apprehend a famous criminal on Earth, Geega, both of their lives changed forever! Now, while Tsutomu's body is reconstructed in a faraway place, the two must share the same body – Tsutomu controlling it by day, and Birdy taking over when she spots a criminal in need of tough justice. All Tsutomu wants is to live a normal life; can he manage to cope with Birdy's enormous eating habits, intense muscle use, and easily irritable attitude?
Birdy the Mighty is about a woman and a boy who share bodies due to an accident. In Cinderella Boy, a man and a woman also end up sharing bodies due to a mysterious accident. Along with this, there is also a lot of crime fighting in both series', although the era and set is slightly different. However if you liked one of these animes there's a very good chance you'l enjoy the other too.
Ryo Saeba and Kaori Makumura are private detectives who make up the City Hunter team -- problem solvers who can be hired by writing 'xyz' in a certain train station. Ryo's uncanny accuracy with a gun is surpassed only by his lecherous tendencies, while Kaori provides the sideline support -- usually in the form of a 50,000 kg mallet to keep Ryo's ecchiness under control!
City Hunter and Cinderella Boy are both comedy/action title that deal with a titular character struggling to make ends meet with their detective/bodyguard agencies. Ryo Saeba of City Hunter because of his perverted ways with many of the female cast members, and Ranma of Cinderella Boy because he takes cases that do not pay too well. They are both solid and satisfying comedies.
Arsene Lupin the Third is the world’s most notorious thief, a master of disguise and an unashamed ladies man! Working alongside his partner-in-crime Jigen, the carefree Lupin, shoots, steals and flirts his way across the world while avoiding his ever-persistent nemesis, Inspector Zenigata. Whether he is trying to win a Grand Prix race, defeat an invincible magician or steal a set of precious playing cards from a millionaire, nothing is impossible for the great Lupin the Third.
Ranma, raised to be a man among men, has a bit of a problem: he is half woman! While training in China he fell into a strange magic spring at Jusenkyo. Now, he is eternally cursed to change into a beautiful woman whenever he is hit by cold water, but that may be the least of his problems; his father has betrothed him to marry! There's never a dull day for Ranma as he attempts to find a cure for his curse, train to become stronger, and grapple with the fact that half of himself may be more feminine than his fiancée!
Cinderella Boy's titular character is named Ranma, after Ranma Saotome - who also transforms into a girl. The artstyle and comedy is also very remiscent of early 90s - late 80s anime, which is the timeframe in which Ranma 1/2 was created.
Ten years have passed since the demise of the bubble economy, a time that polarized the world into two groups of people: the rich and the poor. In the present day, Saiga Tatsumi (a former war photographer) has been hired to investigate a secret club for the rich named the Roppongi Club, but he soon discovers secrets much darker than he’d ever imagined. With the help of a exploited goddess named Kagura, Saiga now possesses the power to kill by simply taking a photograph; but can he stay alive long enough to save her from her captors?
Both shows have an interesting duo of man and woman; not to mention that both of these shows also have sexy drawings and an interesting plot that may not be easy to follow at first by some.