Absolutely, there are quite a few popular manga that delve into gender bender themes, and I find them fascinating! One standout title that comes to mind is 'Ouran High School Host Club'. It’s a classic that revolves around Haruhi, a girl who ends up dressing as a boy to pay off a debt. The comedic situations and the exploration of gender roles are done in such a clever way that it really keeps you entertained while making you think a bit too.
Another gem is 'KonoSuba: God's Blessing on This Wonderful World!'. In this series, we have a character named Kazuma who, after a hilarious yet awkward turn of events, ends up in a fantasy world and encounters a bunch of quirky characters, including a magical girl who can switch appearances. The humor that comes from the various character swaps and miscommunications often leaves you in stitches.
If you’re looking for something a little different, 'Byousoku 5 Centimeter' has a subtle take on gender themes within its beautifully crafted narrative, although not explicitly gender-bender, it provides an interesting look at relationships in different cultural contexts. Overall, these stories have a delightful way of combining humor with depth, making them highly watchable or readable!