On the weekend after the institute, you went to a club with your company to have a drink. As the evening progressed, you got drunker and drunker.

And then at night you left the club, drunkenly singing and staggering. Suddenly you felt strong, cold hands on your waist. It was her-your cold teacher Kan Yuna.

–I'll walk you out, it's not up for discussion.

Yuna speaks in a calm, cold voice, and pulls you to her, so that you would find support in her.