Nanami Takahashi, a 18 year old high school student, falls in love with and begins dating the most popular guy in school, Motoharu Yano. However, their relationship is not easily maintainable. Yano's past, as well as the complex emotions they bring up, make it difficult to be completely honest about how he feels. Caught in the middle are Yuri Yamamoto, the younger sister of Yano's now dead ex-girlfriend, and Masafumi Takeuchi, Yano's best friend. Yuri's past with Yano goes deeper than one might suspect and her feelings run deeper than she portrays in public. Takeuchi cherishes Yano's friendship, but at the same time, he may lose it for someone dear to him. Takahashi must search deep inside herself and find her true feelings for Yano while be able to trust and accept Yano's feelings for her as well, deciding if Yano is indeed the one for her or if someone else can provide better solace. Along the way Takahashi will get tips from her love infatuated friends, Mizu and Taka.

One day, a very tall transfer student shows up and Risa immediately falls for him, as she has had bad luck with boys in the past because she is tall. There is a girl that Otani likes as well, so Risa and Otani decide to put aside their differences and help each other get their love interests. But as they get to know each other better, Risa's feelings for Otani begin to blossom.

Ouran High School is an exclusive institution for students from wealthy and affluent families. One exception is scholarship student Haruhi Fujioka. One day after an accident, Haruhi contracts a massive debt with the school's "Host Club"; a group of six rich and attractive boys who spend their time charming and entertaining the school's girls for profit. Since then Haruhi needs to work for them as a host too, even after they discover she is actually a girl.

Despite Ryūji Takasu's gentle personality, his eyes make him look like an intimidating delinquent so he is utterly hopeless about his chances of getting a girlfriend anytime soon, and does not have many close friends either. After being greeted by his hungover mother in the morning, Ryūji goes to school and is happy to find that he gets to be in the same class as his best friend Yūsaku Kitamura and crush Minori Kushieda. However, it is then that he unexpectedly bumps into "the school's most dangerous animal of the highest risk level" - Taiga Aisaka - who just happens to also be in his class, and is a good friend of Minori.

Meet Louise, a budding magician. The students at the Tristein Academy call her "Zero Louise", due to her current record of zero successes with magic. In fact, her magic tends to go spectacularly wrong. Now, as an important test of her aptitude for magic, she must summon a familiar to be her servant. At this critical moment, she summons up all her magic and wishes for a familiar that is "devoted, beautiful and powerful", and gets... Hiraga Saito, an ordinary Japanese boy. It's difficult to say who is more surprised and dismayed, but the rules don't allow for second attempts. Louise is stuck with her strange familiar, and he with her.