A gloomy high school student Nanoka found at the roof of an abandoned building trying to commit suicide. She likes writing stories in her notebook. 'Minami' is actually the name of her school.

Spoiler

It was later revealed that she was the high school version of Nanoka whose parents died in a plane accident when she was an elementary school student. They fought prior to the accident and she regrets not getting the chance to apologize to them.