（秘）高校生の性生活

The life of a young, Japanese schoolgirl is destroyed when her family is killed by a Ninja-Yakuza family. Her hand cut off, she replaces it with various machines-of-death, and seeks revenge.

When 17-year-old Makoto Konno gains the ability to, quite literally, "leap" backwards through time, she immediately sets about improving her grades and preventing personal mishaps. However, she soon realises that changing the past isn't as simple as it seems, and eventually, will have to rely on her new powers to shape the future of herself and her friends.

Japan, 2020, a few days before the opening of the Tokyo Olympics. Although she should be studying for her final exams, Kokone, a schoolgirl who lives in a small town with her widowed father, a mysterious and talented mechanic, falls asleep often, anywhere, anytime, entering, over and over, a dream-world where a squad of fantastic motorized contraptions fights against magic, a world close to reality where she will find out the keys of her true past.

Summoned by his dying father, Miyagi returns to his homeland of Okinawa, with Daniel, after a 40-year exile. There he must confront Yukie, the love of his youth, and Sato, his former best friend turned vengeful rival. Sato is bent on a fight to the death, even if it means the destruction of their village. Daniel finds his own love in Yukia's niece, Kumiko, and his own enemy in Sato's nephew, the vicious Chozen. Now, far away from the tournaments, cheering crowds and safety of home, Daniel will face his greatest challenge ever when the cost of honor is life itself.

There is a schoolgirl who carries her own personal chainsaw. She was attacked by a dead body who was created by her classmate one day. As such, she does not understand why she was attacked by a classmate. To find the answer she ventures into the enemy's base. There she finds out the reason for the assault.

Giko Nokomura is a female student at Nightingale Academy, who carries around her very own chainsaw. One day she begins to be attacked by modified corpses created by one of her classmates, Nero Aoi . She tears her way through the corpses and busts into Nero's hideout. Why is Nero so intent on attacking Giko?! The reason will shock you!After her battle with Nero, she encounters a new enemy. It's the leader of the Nightingale Academy Student Council Guardians, Nemesis.

An island in Japan is the site for the dumped and the refuse. Nanakusa and Yu who were childhood and school friends meet on this island that is called Kaiden, a scary name that only refers to things not normal or earthly. The reunited friends strike a bargain and are soon involved in cases most would not dare be involved in or become entangled in.

An apparitions of a young schoolgirl in a yellow rain hat, a family massacre, and a law student's suicide after he fails his bar exam are linked by the ominous recordings discovered on an audio cassette.

Only three days before their high school festival, guitarist Kei, drummer Kyoko, and bassist Nozomi are forced to recruit a new lead vocalist for their band. They choose Korean exchange student Son, though her comprehension of Japanese is a bit rough! It's a race against time as the group struggles to learn three tunes for the festival's rock concert—including a classic '80s punk-pop song by the Japanese group The Blue Hearts called "Linda Linda".