Shiori Michishige has always dreamed about meeting her "fated lover." During the spring break preceding her first year of high school, Shiori starts dating Itsuki Karusawa. Although she thought she had finally met her destined soulmate, Itsuki cheats on Shiori and the two break up. Shiori then makes her high school debut with every intention of finally finding her true destined lover and take revenge on her cheating ex-boyfriend… but Itsuki happens to be in the same class?