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.

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.

A mysterious organization called Salvacion has deemed humanity to be a blight on the Earth, and nigh-indestructible bio-monsters called "Kan" roam the Earth under its control, literally absorbing any humans they come in contact with. Humanity's only hope is a young girl named Arina, a genetically-engineered bioweapon immune to the Kan's absorption and possessing incredible power. However, Arina still has the mind of a child -- she's naïve, impulsive, and entirely shameless. Arina, along with her adoptive father Akira Satomura, travel Japan doing their best to stop Salvacion and the Kan from destroying humanity.

After X years of watching over the health and youth of her students, Komaki-sensei comes across what should've been a scene of Seto-kun confessing to Anjou-san—but suddenly, she's summoned to another world, in front of the pregnant Demon King...!? This Anjou-san spinoff is Komaki-sensei's parallel fantasy!

Anthology based on writer Tsutsui Yakutaka’s works.

An young man has to kill 100 friends in order to save his sister's life.

Kitami, a boy serving as class representative, is struggling to get a girl named Toujou — who transferred into the class in the middle of the semester — to fit in better with the class. But try as he might, his effort just goes nowhere. That's the situation when one day, a theft incident occurs in class. Toujou is suspected of being the culprit and becomes the target of bullying. Kitami desperately tries to stand up for her, but he gradually becomes isolated... (Source: Gangan Online, translated)

A high school girl from modern day runs a sweets shop to help revive a hot spring in another world!

Paradise Gakuen's annual competition Miss Paradise is coming soon! But a major incident occured: one of the girls hoped to be a contestant, Chihiro, had her precious part seen by a boy! Chihiro who holds a principle that she won't let anyone other than her husband to see her naked, wants to become Shiba's wife. Because the latter didn't believe her intention, she decides to prove it, by entering the annual competition!

Nagisa has just recently transformed from being a human to a mermaid and is easing into the transition of living in the ocean. But when she crashes into a research submarine, she loses her memory and is brought on board the Sogei. It turns out that her love interest from when she was still human, Osanai, is on board and he tries to keep his past with Nagisa a secret from everyone else. Her mermaid friend, Tsunami, goes on a rescue mission to find Nagisa and warn her that since she just transformed into a mermaid, if she doesn’t speak for an hour, she turns back into a human and her life expectancy will dramatically drop!

Tatsuya is a boy that survived alone in the "land of the dead", a place where it's said no-one can survive for more than three days. He sets out on a journey of revenge in pursuit of Mike DeVilas, the man who killed his father and left him at the edge of the universe. His first target is Goliath, one of the planets ruled by DeVilas. However, the Reapers are waiting there for Tatsuya and intend to eliminate him...