A mathematics genius girl, Nina Machida, starts in a new school and attempts to find her elder sister, who vanished from that school one year ago.

The story follows a group of high school girls who are in the 'Going-Home Club'. Instead of doing regular club activities, the 'Going-Home Club' is...

The story follows a group of high school girls who are in the 'Going-Home Club'. Instead of doing regular club activities, the 'Going-Home Club' is...