Compared to a lot of other "trap" themed manga this has some substance. It's not just bait for shotacons.
Yuuki is an young, androgynous girl who wishes she was more feminine. She saves a young girl from a pervert on a train, only later to learn that was a boy named Junchirou. It turns out they go to the same middle school and that's where the plot begins.
There are two other characters introduced later: A tall, masculine kid named Josei who teases Yuuki and Jirou , who is a crossdresser who's madly in love with Yuuki (and acts somewhat perverted toward her at times but it's nothing too awful). Jun's mom is introduced at one point and it's showed she began forcing him to crossdress at a young age. It's implied she's transgender, which has some awkward implications.
There's not a large amount of fan service, which is nice. The manga is mostly a series of vaguely connected, comedic one-shots but later into the series
they add a romantic subplot between Josei and Yuuki.
I would prefer if Yuuki ended up with Jirou but I'm glad there's no romance between her and Jun. It's far too common for manga to pair best friends of opposite genders together, especially when they're opposites or leads. I typically HATE when reverse traps constantly pine over wanting to be more feminine but this only caused mild discomfort here.
If you want a quick, mildly funny manga with either a reverse trap or a trap protagonist I recommend this. Don't expect some amazing storytelling and character development though.