His name is Bai Xun, a serious otaku. He has a very reliable twin brother. Just because his brother is very reliable, in order to set off him, Bai Xun has been an unreliable person since he was a child. But after being so unreliable, he met his idol after entering a magical school, and was surprised to find that "she" was a vampire. Then not only his classmates in the school but also his reliable brother became strange, and the world became abnormal.