When I was a child, my family lived in a housing complex where I often played with Koukun and Hirokun. Koukun was a troublemaker, while Hirokun was a kind and gentle boy. At that time, with my short hair, I was often mistaken for a boy, and I don't think either of them saw me as a girl. Fond memories. I reunited with Hirokun and Koukun and went back to the housing complex where we used to live, venturing into the underground area that was off-limits... Wait, no, stop! I'm getting married next month...