Akari Mamiya, a first-year student at Tokyo Butei High, idolizes S-rank Butei Aria Holmes Kanzaki and wishes to follow in her footsteps. Despite being an inept E-rank Butei, Akari's resolve to improve remains strong. When the idea of forming an Amica contract (a senior-student mentorship program) with Aria is raised, Akari submits a request form to establish it. Her classmates and friends do not expect Aria to accept the request, mainly due to the girl's strict selection process, but to everyone's surprise, Aria gives Akari a chance through a test, which Akari miraculously passes! However, Aria will not officially make Akari her Amica until Akari meets her standards. Training under Aria will be no easy feat, as she has to concurrently manage her relationships with her friends. Will Akari have what it takes to walk down the same path as her idol?