If you liked the Lovely Complex anime, the Anime-Planet community thinks you'd like:
Short, assertive Shunsuke is fed up with femininity. He grew up surrounded by mostly female students and teachers, he has numerous sisters, and his family even runs a lingerie shop. So when he chose to transfer to Sunshine Academy, an all-male school, Shunsuke was dismayed to discover that it recently became co-ed. To make matters worse, he's quickly befriended by Natsumi, a towering yet kind girl who takes an immediate liking to the boy. With his confident and often brash attitude causing misunderstandings with classmates and teachers alike, Shunsuke's eventful life at Sunshine Academy has just begun!
Both anime feature a couple with huge height disproportion. In both the female lead is huge and the male lead is short. If you were looking for anime with such theme, then those two should suit your taste.
At the end of World War II, Japan was split and a great tower was erected that reached the skies. For three friends, Hiroki, Takuya, and Sayuri, memories of their summer spent together would stay with them forever. During that precious time, the three promised to one day travel to the tower in the skies on the wings of a white plane -- to finally see its brilliance and the surrounding land of Ezo -- but when Sayuri suddenly disappeared from their lives, the promise that once was made was broken. Though time continues to pass, will the three ever meet again some day?
Chizuru loves Yuudai; Yuudai loves Chizuru. Yet neither of them can say it clearly because each is uncertain about the other’s feelings and is afraid of being hurt. Trapped by their insecurities in a relationship that’s going nowhere, they drift further and further apart. While Chizuru thinks this is the end of the road, Yuudai struggles desperately to overcome his cowardly nature before he loses what is most important to him. There are two stories to every relationship, but can love survive if they don’t meet halfway?
In a world where magic is a reality, the young Louise is at the bottom of her class. Dubbed "Zero" by her classmates at Tristein Academy (due to her zero success rate for magic), Louise (along with all first year students) was charged with summoning a familiar; and instead of a cute magical creature, the familiar arrived in the form of... Saito Hiraga, a normal Japanese boy who was abruptly teleported from his own world?! Can both Louise and Saito come to terms with their new and complicated "relationship" and (more importantly) help Saito find a way home?
ZnT and Lovely Complex are both cute anime. The main characters in both have a "complex" about themselves that the other protagonists help them to overcome. But overall these two anime are an easy watch if you want something interesting enough to pass the time.
With war on the horizon, the lives of the students at Tristain Magic Academy are in for a change. As the students train for battle and prepare to join the fight, Louise is determined to protect her childhood friend, now the Queen of Tristain. As her familiar, Saito is sworn to protect Louise and so must ready for battle himself... but with the abundance of pretty girls around, it's a toss-up as to whether Saito should be more worried about enemy attacks or Louise's own jealous rages! Can Saito and "Zero" Louise stand up to the challenge and protect their friends and country?
Lively, energetic, vivid, cute, having thousands ideas per second, not so fortunate in love, but not so unfortunate either - this is how you would describe main female character of LC as well as ZnT. If the girl was what you liked about series, you surely will enjoy another one :)