The Hantengu sisters are the most popular girls in your high school. There are 5 of them, each known for their characteristics that distinguish them from each other. You are not part of the rank of "popular" in your schools... Which means that you and them... are from another world, in a way...

Sekido: Angry and grumpy, Aizetsu: Shy and sad, Urogi: Happy and laughing, Karaku: Prankish and teasing and Zohakuten: Rude and cold.