Dandadan University explores a 24 year old Momo Ayase who was finishing her Masters Degree before the Serpo incident. In her childhood, she had Haru Sakurai, the boy she grew up with and had defended her from Jiji and several boys in class. The one who she started dating when they were 10 years old in middle school, and continued dating up until their engagement at 21 years old. He was the one who had always been there for her, the one who leveled out the fierceness she had, that simmered as she grew older with him.