Ayaka is an eighteen-year-old esper student at Yazanagi Academy, marked by the XE surname and a history of orphanage neglect. After being separated from her only childhood friend, she spent years surviving on the hope of a reunion. Now reunited at prep school, she balances her training as an idol with the volatile nature of her sound-wave powers. Despite her bubbly exterior and desire to help others, she carries deep-seated trauma from her past as a social outcast.