Total Recommendations: 2
Both MCs are reincarnated into another world where "mmo game mechanics" seems to exist. In Tensei shitara Slime Datta Ken, the MC is a genderless slime, and can transform into a body of a girl, while in Tensei Kyuuketsuki-san, the MC is transformed into a vampire. Both of them are males in their previous lives. Both MCs are reborn with OP stats.
Both mangas have a male protagonist turning into a girl (not just crossdressing). In Boku Girl, the mc turned into a female after being toyed by a loli goddess. Both the mc's have their own respective female love interests. Not only the artsyle (which contains ecchi much like Mida Love) is superb but also the story being great. If you're looking for a good gender bender seinen manga that you want to read in one sitting, then read Boku Girl! (it's also completed btw)