Lenalee had been executed by the crown prince as a part of his scheme, but when she awoke, she found that she gone back three years into the past?! She's determined to change her life the second time around! And so she chooses... to dress like her younger twin brother Liam and enroll at Fortis Academy in his place! But for some reason, Fasias, one member of the four-person group headed by the crown prince, takes a liking to her?! Thus begins a school love story between a young woman who absolutely can't let her secret get out, and a crown prince who can't be honest with himself!

The Lowreis family was wrongly sentenced to execution for attempting to murder the royal family. As Linali Lowreis, the daughter of the family, is on the brink of death, she fervently prays for a second chance. Miraculously, she wakes up three years in the past, reuniting with her deceased family members. However, tragedy looms as her brother, Liam, is poised to attend the School of Poltis, the reason for the family's tragedy. She begs her father to send her instead of her brother, as she is better at sword fighting. Now, faced with a new identity and unexpected challenges, Linali must attend the School of Poltis in her brother's place.