If you're looking for manga similar to A Mismatched, Complicated Love, you might like these titles.
Mizuno Sawa, high school first-year, is a quiet and reserved girl living under the social radar. Her school is also home to the band "Blue-Burst", made up of four boys from the pop music club and hugely popular among the students. Of course, Sawa and the band members pass their time at school without ever crossing paths - except, Kouichi from the band is secretly her twin brother! Kouichi is an amateur model on top of singing in the band, and basically the school's superstar; but despite his superstar smile on the surface, his true face is a sneering demon. When he double books a modeling gig with make-up lessons at school, the idea strikes him to make Sawa take his place at the lessons. Poor Sawa has a complex about defying her brother, so in the end she puts on his boys' uniform and heads to school. From that day her plain, quiet high school life changes completely!
Yuzuko's a positive, always charming girl with the horrible habit of verbal diarrhea. Just when she's done it again and insults someone, she's saved by a drop dead gorgeous maid from the Maid & Butler café. Little does she know that the maid is none other than the high school hottie Itsuki...
Ritsu had always hated her rival Kanzaki, a cram school classmate, since he seems to be beat her in everything. On the other hand, she loves her beautiful best friend Yuuna. When Ritsu and Yuuna was asked if there is a boy they like, Yuuna had suprisingly answererd yes! Who is the boy Yuuna likes- could it be Kanzaki? But wait, that's impossible, because--
Hinata Saotome is suddenly asked out by En Shinohara, a gorgeous boy in her grade. What she doesn’t know, though, is that his hobby is cross-dressing! En has always hated men, and whenever he sees his own reflection, he punches out whatever is doing the reflecting (windows, mirrors…). To combat this hatred, he dresses up as a girl. Hinata decides to go out with him anyway, despite his weird hobby.
Mahiro, who was once called a "genius girl" in the world of painting, returned to the countryside after an incident and lived like a shell. One day, she lost her place of life and fell on the roadside to become a “male” art teacher and to live in a super-yankee school!
Sawa's a Freshman in a public high school, except she has no idea how to talk to boys. She gets so anxious she can't even speak! One day though, while worrying about even the possibility of having a relationship in the future, she meets a kind girl at a convenience store. But Sawa never would've expected that this nice girl... would turn out to be Yuuto, a boy who went to her elementary school! His older sisters force him to dress as a girl and run errands! Yuuto, who has his own set of issues, decides to start teaching Sawa about love in secret.As Sawa's fear of boys begins to wane, the two of them start having unexpected feelings as the lessons continue...
Girls are forbidden to fall in love in that school? Rules are strict because only wealthy girls can enter in that school. There, she doesn't know why but she started to have her heart beating for a girl named Shinonome Ryou... Why is the secret that this school keep...?