Nanako Misonoo is a first-year student entering into the elite world of Seiran Academy. She quickly finds herself immersed in a landscape filled with female rivalry, jealousy, and love. As her journey unfolds, she learns about an exclusive sorority within the academy, where only a select few are granted entry. To her surprise, Nanako is chosen to join this elite group, alongside her classmate Mariko Shinobu. Despite facing jealousy and rumors from others, she finds comfort and support in her new friends, Kaoru Orihara and Rei Asaka. From this moment on, Nanako becomes intertwined in the lives of The Magnificent Three, the three most popular girls at school.