The Suzuki Kei is a mini-car crossover model that combines a wagon and an SUV, and is the successor to the Suzuki Kei, which was discontinued in 2009. There were many people waiting for a successor to the Suzuki Kei, which was a crossover between a wagon and an SUV, and in response to their expectations, Suzuki made improvements such as better off-road performance based on the platform of the fifth-generation Wagon R. In 2014, it was launched as the Hustler. As soon as it went on sale, the Hustler was well received for its spacious interior, high rough-road capability and adorable design, and became a best-selling model that attracted support from a wide range of users.

Succubus, Dullahan, Snow Woman and Vampire. We are a little bit different from humans, that's the 'subhuman'. These days they are called Demi. This is an exciting and heart-warming subhuman comedy about these unique "subhumans" and the high school teacher Tetsuo Takahashi, who is very interested in them!

Twin sister of vampire Hikari. Not subhuman, but a normal human. She has excellent grades and is a strong person.

Succubus subhuman female. She is a colleague of the main character Takahashi, a mathematics teacher. She is a succubus, which means that she is able to make her partners become prostitutes, but in fact she has never been in love at all. Although she is quite beautiful and stylish, she always wears a jersey, glasses and a hairdo.

A subhuman female high school student who is a snow-woman. Her body is cold and she is not good in hot weather. Actually likes gag comics and is good at cooking.

A Dullahan high school girl, one of only three in the world with a separate head and torso. She loves to have her head hugged. She is also an honours student with excellent grades.

Vampire subhuman high school girl. Mischievous and talkative. Favourite food is liver and tomato juice. Has a twin sister named Himari.

Protagonist. A high school biology teacher, he has dreamt of working with subhumans since childhood. In his fourth year in his post at his workplace, a high school, he has had the opportunity to work with many subhumans. He is big and muscular.