Mao is known for her godly strikes in volleyball which she gained the title 'Devil on the Court', partially due to her extreme hellish attacks and mostly because of her given name. It's the start of a new year for her as a third year - the final year in highschool, Mao decides to colour her dull school life with the help of the school's male volleyball team. Not only do they help colour her life but soon she gets stuck in the lustful world of volleyball, attracting attention from other teams such as Aoba Johsai and Karasuno. The more she hangs out in the volleyball world the faster she gains a new title. 'Devil in the Sheets'