With her cool, mysterious aura, transfer student Ishikawa Luna is already the most popular girl in class. Ohtori, on the other hand, is so average he's practically a background character. The thought of ever speaking with Luna never even crossed his mind—until he accidentally discovers her secret: She’s a vampire…who's absolutely terrible at sucking blood!

With her cool, mysterious aura, transfer student Ishikawa Luna is already the most popular girl in class. Ohtori, on the other hand, is so average he's practically a background character. The thought of ever speaking with Luna never even crossed his mind—until he accidentally discovers her secret: She’s a vampire…who's absolutely terrible at sucking blood!

我的同班同学石川月菜是吸血鬼。帅气又带着神祕气息的她是班上的人气王。
然而事实上，她似乎超级不擅长吸血…？

Theater has taken the entire world by storm in the 20th century, and teenager Kokona Ohtori aims to take the big stage. Performers who shine the brightest are called Dai Stars, and for Kokona, her first step into stardom is auditioning for the prominent theater troupe—Sirius. As she cultivates her unique sense for the stage, a story of passion and aspiration unfolds in this super-theater age.

某一天，一封招待信送到一群少女们的手中。这个招待信可不一般，那是融合了时尚、舞蹈、音乐等的孩子梦想的“美妙天堂”世界入场券。在那儿，每天都可以参加唱歌、跳舞、时尚的竞赛，而比赛实况也将通过电视和网络向全世界播出。如今的顶级偶像也都是从“美妙天堂”当中诞生的。主角啦啦和他的朋友们也对于“美妙天堂”的世界充满兴趣。不过啦啦的学校却禁止小学生参加这些活动……然而，因为一次奇妙的契机，啦啦第一次走进这个传说中的世界，结果还登上了比赛的舞台。那么啦啦的“美妙天堂”出道演出究竟会如何呢！？

故事发生在遥远的未来，彼时，大陆板块的活动令海水渐渐淹没了日本的大部分国土，人们不得不在海上建造起新的都市。随着时间的推移，海上都市的规模越来越大，航路越来越复杂，为了维持秩序，一种人们称之为“蓝色人鱼”的新型职业渐渐被大众所接收和憧憬，这份光荣的职业亦成为了很多女子高中生们未来奋斗的目标。
活泼开朗乐观向上的岬明乃（夏川椎菜 配音）、沉默寡言外冷内热的宗谷真白（Lynn 配音）、害羞内向但在熟人面前有着十分可爱的一面的立石志摩（古木望 配音）、傲娇毒舌非常在意自己身高的西崎芽依（种崎敦美 配音），这些个性迥异的女孩子们，是否能够实现她们心中的理想呢？

Together with her father, who had quit his salaryman job, Toyokawa Himeno moves to Gifu prefecture's Tajimi city. That's the city where her mother is from, whom she had lost when she was still young. Himeno is now attending her mother's alma mater, where her classmate Kukuri Mika invites her to tag along to a special place. That place turns out to be the pottery club! There, she learns for the first time that her mother was a legendary potter, and is consequently pulled into the world of pottery.

Taichi Nishimura is a typical, average high schooler, and Azuma Rin is a beautiful woman with the build of a model and excellent reflexes. The two live an ordinary high school life until one day, they're suddenly enveloped in a mysterious magic circle and transported to an unknown land.

That world is full of terrifying monsters, beastmen, dwarves, elves, and many other races right out of fantasy. To survive in this new world, Taichi and Rin decide to become adventurers, but when they take the aptitude test, they discover they both possess cheat-level magic.

Mobius is a perfect digital world for the imagined benefit of humanity by μ, a virtual idol program that attained sentience and self-awareness. Only humans who are suffering in the real world and strongly relate to μ's songs are lured into Mobius. Once they enter, people often forget that the real world exists. Regardless of age or gender, they are turned into students and forced to experience school life over and over, which μ considers "the most radiant time in a person's life."

The students of Class 3-E have a mission: kill their teacher before graduation. He has already destroyed the moon, and has promised to destroy the Earth if he can not be killed within a year. But how can this class of misfits kill a tentacled monster, capable of reaching Mach 20 speed, who may be the best teacher any of them have ever had?

A class of junior high "misfit" students who are tasked with assassinating their new teacher, an octopus-like creature nicknamed Koro-sensei, who destroyed the moon and threatens to destroy Earth in a year. The students have to learn to balance their assassination attempts with the lessons from Koro-sensei, who is surprisingly an excellent teacher, while the government offers a ¥10 billion reward for his head. Each episode often focuses on individual students, their growth, and their internal conflicts between wanting to kill their teacher and growing to care for him.