If you liked the Blaue Rosen manga, the Anime-Planet community thinks you'd like:
Kyo Aizawa, an ordinary girl, is excited to learn that she has been accepted to Seisyu Academy. However, her excitement is turned to mortification as she looks at her school uniform for the first time and realizes that it's a boy's uniform! It turns out that her father, an ex-basketball player, enrolled Kyo as a boy in order for her to play on Seisyu Academy's famous boys' basketball team. And as if things couldn't get worse, Kyo discovers that not only does she have to play on the boys' team, but she also has to live in the team dorms. Can Kyo keep her secret safe?
When it comes to gender bender these titles take the win!
Very funny, romantic and awkward moments in between but with a special twist! they both have the same objective, trying to get the person they love closer to them by any means possible even if it means dressing and acting like the opposite sex.
For another nice music theme manga this can be the next thing you can read, though it does not actually focus on sexual tension between the characters you can be very moved by the story and how a series of mysteries lift up to envail a very nice love story.
Both Never Give Up! and Ai wo Utau Yori Ore ni Oborero! have the same gender-bending theme to them.
In both, one of the main characters has to disguise themselves as the opposite gender, to be with the one they love.