
If you're looking for manga similar to Haai Step Jun, you might like these titles.
In the future, an organization called the GGP has taken control of the world. Rin Ogata was a promising up-and-coming ballet dancer, but suffered a serious injury while dancing and decided to quit. Years later in college, she comes across a club building and soon finds herself intrigued by a transforming motorcycle-like robotic vehicle called a "Rideback". She soon finds that her unique ballet skills with balance and finesse make her a born natural on a Rideback. However, those same skills also get her into serious trouble with the government.
When I came down with a cold and was bedridden, a beautiful woman wearing cat ears appeared before me. But it turns out that she was actually my pet cat...?! She's usually calm, cool, and collected, but put cat ears on her and she's fawning all over me. How will my love with this mysterious beautiful woman turn out?
Eiji is a high schooler living with his father - a novelist who can't sell his works. Eiji is rather anti-social, nerdy, and worst of all, poor. But he is a kind, honest young man who never forgets how his deceased mother taught him to be compassionate towards others. He (along with everyone else) deeply admires his classmate Aoi-san, the daughter of the president of a large corporation. But Eiji had never been able to face her due to the enormous difference in their social standings. One day after school, he returns home to find that Aoi had come to visit him, and there, she says a few words that astonish him even more than he already is...
Birdy and Tsutomu are still co-existing in the same body, as Birdy continues her duties as Federation Investigator and celebrity persona, and Tsutomu seeks to balance them with his normal everyday life. When a criminal group connected to the Ryunka incident escape from custody, hiding themselves and their alien identities on Earth, Birdy and Tsutomu are thrown back into action. It seems, however, that there are other forces involved, as well as old faces, which give Birdy time to reflect on the past, and the people that influenced her.