The Rinkaiji family, by all appearances, is a well-to-do Japanese family. The father, Nariyuki, works in an elite corporation, which gives his wife Yoshiko status in their suburban neighborhood. But the daughter Sugina, who herself has secretly stopped going to school because she is being bullied. One day, they discover that Nariyuki has quit his job. As Nariyuki decides to find a new job along with Sugina, Yoshiko, a firm believer in a life based on the company, soon finds her world falling apart.
In the late 1990s, society is descending into ecological collapse and totalitarianism. Saiga Riki-Oh, a mysterious man with a six-pointed star on his fist, finds himself at the privately-owned Tokyo State Prison.
Humanity is under attack by human-mimicking flesh-eating alien parasites. One parasite bonds with his young high school student host, and he convinces the parasite to help him stop the others.
Makoto's grandfather was the principal of the great Onodera Academy, and when he passed away, he left Makoto and his school staff with one very important will - "The one man who is able to seduce Makoto with his superb sexual techniques will be given the right to take over as Onodera Academy's new principal!" Because of this ridiculous last request, Makoto is now every faculty member's target for sexual harassment! Desperate to protect his virginity, Makoto seeks help from his childhood friend (and the man who he has always loved), Kintaro.
One day, Shiro's all-time favorite idol Mami Mitsuya suddenly appears right in front of him! Even though this meeting left him excited, his partner Kenji ends up unhappy.
Kabuki, a detective in Kabukicho, Shinjuku, and his partner, Kabuki, a T-back detective with a lot of sensuality, are chasing a pachinko chain sales of 120 million yen.
A man with a low IQ has accomplished great things in his life and been present during significant historic events—in each case, far exceeding what anyone imagined he could do.