When they met (Fem Nagisa X Karma)

Karma and Asano have been best friends since they were children until they met blue haired E-class girl named Nagisa and her twin brother Nagiko then they can't stop fighting over her. but their is a secret that the twins a keeping that could change the everything. (their will be smut /lemon much later in the story so fare warning and their will be Kaede x Nagiko.)