In the 11th year of the Meiji Era, the end of the samurai shogunate and the prohibition of swords has left Japan with lasting scars. Displeased by these recent changes, many former samurai plot against the new government, inciting a wave of bloodshed. To counter this movement, the government constructs a colossal prison in the middle of Lake Biwa. Unofficially assigned to help the police arrest criminals, Tenka Kumou also serves as a ferryman to the Lake Biwa prison with the help of his two younger siblings: the ambitious Soramaru and the enthusiastic Chuutarou. Together with the former Fuma ninja Shirasu Kinjou, the Kumou brothers live a frugal and joyful life mostly dedicated to studying and training. However, behind this relatively uneventful daily routine, the specter of the "Orochi" curse is starting to spread its shadow over the city of Oumi. According to legend, every three hundred years, Orochi reincarnates in a human vessel—and it is believed that this is the harbinger of an imminent catastrophe. As various groups clash in search of Orochi's vessel, some aim to seal the curse, while others have darker plans in motion.

All of a sudden, they arrived: parasitic aliens that descended upon Earth and quickly infiltrated humanity by burrowing into the brains of vulnerable targets. These insatiable beings acquire full control of their host and are able to morph into a variety of forms in order to feed on unsuspecting prey. Sixteen-year-old high school student Shinichi Izumi falls victim to one of these parasites, but it fails to take over his brain, ending up in his right hand instead. Unable to relocate, the parasite, now named Migi, has no choice but to rely on Shinichi in order to stay alive. Thus, the pair is forced into an uneasy coexistence and must defend themselves from hostile parasites that hope to eradicate this new threat to their species.

Chuukan Kanriroku Tonegawa is a spin-off of the Kaiji series, which follows Tonegawa, the right hand man of Kazutaka Hyoudou, the president of the Teiai Corporation and owner of numerous gambling tournaments. After Hyoudou is getting bored with his life, he orders Tonegawa to organize a so called "game of death" as it is his and his subordinate's job to keep the president in a good mood. Tonegawa must cooperate with his subordinates in order to make the president happy and what follows is a humorous story of his interactions with his subordinates and other characters of the Kaiji series. (Source: MAL News)

With his muscular build and tall stature, Takeo Gouda is no ordinary high school freshman. However, behind Takeo's intimidating appearance lies a pure heart of gold, and he is considered a hero by his male peers for his courage and chivalry. Unfortunately for Takeo, his appearance does not bode well for his love life. As if his looks were not already enough to scare the opposite sex away, Takeo's cool, handsome best friend and constant companion Makoto Sunakawa easily, and unintentionally, steals the hearts of the female students—including every girl Takeo has ever liked. One day, when Takeo saves cute Rinko Yamato from being molested, he falls in love with her instantly. Unfortunately, he suspects that she might be interested in Sunakawa. Despite his romantic feelings for Yamato continuing to bloom, Takeo decides to act as her cupid, even as he yearns for his own love story.