Kijoo is known for being more rational than anyone—except when it comes to love. Every time she falls for someone, she turns into a total pushover. Convinced things would be different with her latest boyfriend, she ends up in a heated argument that sends her tumbling down a staircase. When Kijoo wakes up in the hospital, a strange "review window" appears before her eyes. "What is this? Reviews from his ex-girlfriends... rating him?!" Could this mysterious system actually help salvage her love life—or is it just another twist of fate?