With her father murdered, and her mother and sister abducted, Ason Asaki is now the leader of her land. She hunts down the person responsible for the crimes against her family only to find out he is a demon that Asaki is no match against. She is saved by Mikazuchi and Hisui who use their powers to protect her. Mikazuchi makes a contract with demons to borrow their strength and Hisui is actually a sword in human form that Mikazuchi uses to destroy evil. Mikazuchi is looking for the ten demons responsible for the destruction of his town and massacre of its people. Both sides soon realize that their fate is intertwined with each other.
Reijirou Yuuki, known by friends as Rei-kun, a boy notorious for being late to school, is suddenly hit by a truck and killed on one of his many rushes to class. He then roams the earth as a ghost, only being visible to his classmate Kodama. Reijirou finds himself and Kodama in many adventures involving his ability to possess, and gets himself tangled up with the lives of his classmates and friends, including Takeshi Gama: the bully, Kaoru Tachibana: the perfect transfer student with a secret, and Bell: the demon working a part-time shift as a shinigami. Later in the series, Reijirou goes beyond his neighborhood to other parts of Japan with Bell to raise his reincarnation credit score, leaving Kodama behind.
When the protagonist “Left,” reincarnated into another world, the gift he received was a “Plant Encyclopedia”—an ability that could only summon weeds. However, this blessing concealed a true power…!? A tale of becoming the strongest plant user by wielding a unique gift!
The human army lost the battle against the vampires on the island of Higanjima. Unable to prevent Miyabi's plan, Japan became a vampire country. Six months later, there is a one-armed man fighting the vampires in abandoned Japan! The man's name is Akira Miyamoto. A warrior who has already tasted hell on Higanjima.
The story of a boy, Akira Hiroin whose mother always wanted a daughter. His father, a scientist, makes him take (without knowing) a remedy that turns him into a girl.

