Manga by author Ohmi Takeshi - Status ongoing

This is the sequel toBokura no Fushidara

Ishikawa Takuya, a high school student who doesn't stand out in any particular way, is surprised when his principal asks him to take care of some transfer students. He is even more surprised to find that there are actually 30 charming female transfer students in his care, who have come from a boarding school that was destroyed in a fire! At first it seems like a dream come true, but then he notices their knives... and guns... What kind of school did these girls come from?

When Hideto, a high-school student who is afraid of women, is suddenly targeted by a beautiful older woman whom he believes to be a molester, he runs for his life. Mid-pursuit, he is attacked by what he previously believed to be an illusion, a blur that nobody else could see.