Succubus, Dullahan and Vampire. They are known as Ajin, or "demi" and are slightly different than the average human. They have lived alongside humans for ages under persecution. However, in recent years, they have become accepted as members of society. This manga follows a high school biology teacher who has a great interest in demi and his interaction with the various demi in his school, each with their own cute problems.
Note: Won the DaVinchi x NicoNico Tsugi 2016 Manga Awards by taking 2nd place.