One day, the moon exploded, leaving it in a perpetual crescent-moon shape. The creature who claims responsibility for the destruction also claims it will destroy the world in March of next year. With powers beyond human comprehension, no military can stand against it. Yet, for some reason, it chooses to take up occupancy as a teacher in the worst class of Kunugigaoka Middle School. The fate of the world rests in the hands of its students, as they have until graduation to figure out how to murder their teacher and collect ten billion yen for saving the world.
Class 3E is about to begin their second semester. And while some things have changed, the class assignment is still the same: kill their teacher before the end of the year. Easier said than done since Koro Sensei's made it clear he won't go down without a fight.
A short flashback of what happened in prequel of Heaven's Lost Property series until there's an Angel, Hiyori Kazane who is dreaming while her real body is in heaven. She had a crush on the main protagonist, Tomoki Sakurai who fight until the end where the world has memory about Hiyori erased when she died in her dream and returned to her real body. She wanted to return to her dream so much that she got modified into an Angeloid of Clockwork by heaven's master but got back consciousness with help of Tomoki. However, it was not enough to save her life.
Seven schools are constantly "at war" with each other, and the students within—both male and female—have become skilled fighters and constantly battle with rival schools. Their lives and fates are guided by strange jewels that contain the spirits and destinies of warriors from the Sangokushi period. One girl, Sonsaku Hakufu, has recently moved to Japan and is apparently destined to unite the schools as her counterpart united seven countries long ago. But, like all heroes, there is a darker side to her fate, and as always there is a constant struggle by those around her to break the chains of their own destinies and make their own lives.
Loosely based on the novel "Romance of the Three Kingdoms", modern day Japan sees a similar struggle for power between different rival schools with the three strongest being: Kyosho Academy led by Sousou Moutoku, Nanyo Academy by Sonsaku Hakufu, and Ryuubi Gentoku from Seito High School. Together these three tousei, each with their own mangatama, fight for the honour of becoming ikki tousen and fulfilling their fated destiny through battle and conquest.
Preparing for the battles to come, tournaments and to fight against new opponents from over the world, Hakufu is working to have enough money to make her dream true. But she doesn't consider that old and new allies and enemies will come to scene, and also being a weak leader to the eyes of her companions. A sister also appears. She doesn't even know her mom's past so better to start from the local stuff before attempting to go worldwide.
The main fighters are summoned to a tournament that involves the heads of all the schools. But some of the heads send their trust fighters in their place. They don't realize that the tournament is just the face of a conspiracy to take over the clans. Hakufu now has a disciple as crazy and skilled as her and due to her laziness the disciple ends on the tournament in the place of her master. Now they must prove that the destiny imposed by the souls of the fighters living in their own is not always an absolute law.
After winning a fierce battle against Yosen High, Seirin High basketball team successfully advanced on the semifinals of the Winter Cup. They continue aiming to become the champion but this makes hard for them since they're against powerful opponents.
Masamune Makabe was mercilessly teased for being overweight as child, especially by a girl named Aki Adagaki. Masamune decides to get his sweet revenge by transforming himself into an attractive, intelligent, and athletic young man. After many years honing his new persona, he transfers to Aki's school in hopes of finally getting his long-awaited vengeance.
In a world where magic is not a fairy tale but has existed for one hundred years siblings Tatsuya and Miyuki Shiba prepare to begin their studies at the elite Private Magic University Affiliated High School (Magic High School for short). Entering on different levels of the academic spectrum the two turn the once peaceful campus into a chaotic one.