Tokyo Butei High School is a special school where armed detectives—"Butei"—are trained to use weapons. Kinji Tōyama is a second year student who has a special ability, but he keeps it a secret to maintain an ordinary, peaceful life. However, when he gets caught in a bombing on the way to school, he encounters Aria H. Kanzaki, the most powerful S-Rank Butei student in Assault Studies.
Thirty years ago a strange phenomenon called a "spacequake" devastated the center of Eurasia, claiming the lives of at least 150 million people. Since then, smaller spacequakes plague the world on an irregular basis. Shido Itsuka, a seemingly ordinary high schooler comes across a mysterious girl at the ground zero of a spacequake and learns from his sister Kotori she is one of the "Spirits" who are the real cause of the spacequakes that occur when they manifest themselves in the world. He also learns that Kotori is the commander of the airship Fraxinus, crewed by the organization Ratatoskr, and is recruited to make use of his mysterious ability to seal the Spirits' powers thus stopping them from being a threat to mankind. However, there is a catch: to seal a Spirit's power, he must make her fall in love with him and kiss him.
Ten years ago Fujiwara noticed he had a power to see multicolored auras surrounding the person's body. Ever since then he's been having a weird dream about a war with cats. Then one day a mysterious girl falls on top of him...
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.
Shibaki is a high-school boy whose only interest is girls. Except he's been branded as the most perverted boy at school and the girls avoid him like the plague. One day he finds a book in the library about how to summon witches. An apprentice witch named Rurumo appears to grant him a wish. Shibaki helps Rurumo and she in return refuses to take his soul. When the story starts, Shibaki wishes he could see Rurumo again. His wishes is granted immediately as Rurumo falls from the sky and crash lands in front of him. He finds out that as punishment for not taking his soul she's been busted down to an apprentice demon. Now, she must complete the task of getting Shibaki to use up 666 magic tickets that grant wishes before she can become a witch again. However, what she doesn't know is that each time he uses a ticket it shortens his life. When the last ticket is used up, Shibaki will die. Shibaki knows this because Rurumo's familiar black cat Chiro tell him as part of the "contract" for giving him the tickets. Now, Shibaki has a choice, make a wish and help Rurumo become a witch again or resist the temptation and try to save his own life.
The story centers around Kanade Amakusa, a boy cursed with the mental power of "absolute multiple-choice" — a multiple-choice quiz will suddenly appear in his mind, and the choice he makes will become his reality. For example, he would have to choose between going nude from the waist up or the waist down in school. While in school, he is given another choice: 1) A beautiful girl will fall before him or 2) he will fall from the rooftop in female clothes. He chooses option 1, and a blonde girl named Chocolat falls before him.
As a child, Raku Ichijo made a secret promise with his childhood sweetheart, keeping a pendant as a memento while his love took the key. He dreams of one day meeting his past love, but years later, reality smashes his hopes when Chitoge Kirisaki accidentally knees him in the face. Though Raku's a normal high schooler, his family heads the notorious yakuza gang the Shuei-Gumi faction. And he's dragged into family affairs when he's forced into a relationship with Chitoge, the daughter of a rival gang's boss.
Usagi Tsukino was a normal second-year middle school girl whose own life changes one day when she encounters a black cat. The cat's name is Luna who can talk and bears a cresent moon on her forehead. Luna tells Usagi that she is the chosen guardian of justice with the power to transform into Sailor Moon. Usagi now has a new responsiblity which is a mission to find the Illusionary Silver Crystal as well as the other chosen guardians to protect the Moon Princess. During her mission, she must deal with various enemies sent by Queen Beryl who is also after the Illusionary Silver Crystal.
Minato Sahashi is extremely intelligent, yet due to his inability to cope under pressure has failed the college entrance exam twice. As a result he has been branded an idiot and loser by many. One day after talking to his yet again disappointed mother he comes into contact with a girl named Musubi who was under attack. The girl runs but takes him with her and soon finds that Minato, while unknown to him, is an Ashikabi, one of the mysterious set of masters that have the genetic trait that can become partners with some of the 108 cute girls, buxom women, and bishōnen called "Sekirei". The reason for the partnership allows the Sekirei to use all their power to win in the competition held by the mysterious MBI corporation.