N/A
Advanced placement into a school of higher grade proof-reading is determined by the results of the Promotion Test strictly for class type. Ranging from A class with the best facilities anyone can offer all the way down to F Class which is composed of low dining tables, rotten tatami mats and other worn out facilities. Students can change classes by competing using the Examination Summons Battle system or ESB. Students summon characters with their equivalent test mark scores and use them to compete with other classes.
The story revolves around a highschool boy named Niwa Makoto. He lives with his aunt's family since his parents are away on business. It is there where he meets his mysterious cousin of the same age Touwa Erio — who happens to tie a futon mattress around her upper body and is a self-proclaimed alien. Her staple food is pizza. Erio had been missing for half a year and was found floating in the sea. She doesn't remember anything about what happened during that period of time, but she began to think that it was the act of an alien and wanders the neighbourhood wrapped in the futon.
The main character, Yuuta, is supposed to be the viewer's younger brother who goes off to study abroad on a small island in the Atlantic that can not be found on any map. The school he enters is called St. Alphonse Academy. The boys who study here are all "marginal princes" which appears to mean Princes of remote, frontier or border regions.
Seiji Hasumi is a popular English teacher in a private high school. He is also a violent and sociopathic killer who concocts an extreme plan to deal with the rise of bullying and bad behavior among the student body.
Seven people who committed the seven deadly sins : lust, gluttony, greed, sloth, wrath, envy and pride are locked up in a sealed space by someone. These seven people must play a game which is a matter of life or death.
Yukihiko Nishino is very popular with women, but, in the end, he is always dumped by a woman. Yukihiko seeks out his true love.