ADN-274 I was left behind at school on the night of the typhoon, and I was alone with my students until morning... Natsume Saiharu

A large typhoon that occurs once every few years. Let's go home early today... that's what I thought, but before I knew it, it was the usual time. The trains were canceled...the roads were flooded...I ended up staying the night at the school. That was the time. ``Teacher...what are you doing up until this hour?'' Student Utsumi was also left behind at school. The two of us are alone in the large school building until morning, and a dangerous and lewd night is about to begin.