After an outbreak of a new strain of pharyngoconjunctival fever, a group of students at boarding school are ordered to stay within the school facilities for two weeks at the beginning of summer vacation, as the virus may still be residing in their systems. Touma Shin, one of the students forced to remain at school, soon finds himself cast out of his room in the dead of night over something petty. Wandering around the campus in attempt to calm his nerves, he is suddenly threatened by a mysterious gothloli girl brandishing a shovel. Now, here's the thing - all of the girls being kept at the school come across as extremely young in terms of both physical appearance and height. What exactly is the meaning behind this? Well, the answer will become clear in due time...

"Eh? What do you mean that Shihon-chan might die? Eeh? Shihon-chan's head has gone missing?" It seems Shihon-chan's headless body was found in the meditation room. A murder isn't unusual, after all, there's at least one bloodthirsty killer at school. Murdering people is fine and all but it's considered a taboo that must be never violated to decapitate and hide their head because one can never be revived if so. If her head isn't found within two days, she'll really kick the bucket! A boarding system school isolated from the outside world, and there do the immortal girls live. The time it takes for them to become an adult is the same time it takes for them to deage and become a baby, they grow up until they become an adult once more and then do they deage again⁠—a cycle that's being repeated. There's only one condition in order to graduate from school: one needed to be deemed a prodigy by someone observing from the outside. The moment that verdict be handed down, the girl's graduation would be recognized and she would disappear from school. The immortal girls' peaceful school life would be greatly disturbed by a certain murder case. [From the [url=http://www.silkysplus.jp/game/fuyukuru/introduction.html]official website[/url]]