Yoon Ha-eun has never been the type to back down from a challenge—and Han Seo-jun is the last person she ever wants to challenge.At a university in Seoul, Ha-eun is hardworking, outspoken, and determined to build a future on her own terms. Seo-jun, on the other hand, is wealthy, confident, competitive, and seemingly impossible to impress. From their very first encounter, the two clash over almost everything.Unfortunately for Ha-eun, avoiding him becomes impossible when their professor pairs them together for a semester-long project.Neither of them is happy about it.What begins as constant arguments soon turns into an unexpected partnership. As they spend more time together working on their project, Ha-eun starts noticing a different side of Seo-jun—the quiet moments behind his arrogant attitude, the family problems he refuses to talk about, and the mysterious photograph he is determined to keep hidden.Seo-jun also begins to realize that Ha-eun is not the person he first assumed she was. Beneath her stubbornness is someone caring, ambitious, and strong enough to see through the walls he has built around himself.But the closer they become, the more complicated everything gets.Old secrets, misunderstandings, family pressure, jealousy, and feelings neither of them wants to admit begin to threaten the fragile relationship they are building. The two people who once couldn't stand being in the same room slowly find themselves unable to ignore the way their hearts change whenever they are together.Sometimes the person you hate the most is the person who understands you best.And sometimes, falling in love with your enemy is only the beginning.

Yoon Ha-eun has one simple rule: stay away from Han Seo-jun.He is arrogant, competitive, and far too confident for someone who seems to Yoon Ha-eun has one simple rule: stay away from Han Seo-jun.He is arrogant, competitive, and far too confident for someone who seems to enjoy annoying her. From the moment they meet, the two can't stand each other. Every conversation becomes an argument, and every encounter turns into a competition.But when their professor unexpectedly pairs them for an important university project, avoiding each other is no longer an option.Forced to spend time together, Ha-eun begins to discover that there is more to Seo-jun than his cold attitude and perfect reputation. And Seo-jun starts to realize that the girl who challenges him at every turn may be the one person who actually sees him for who he is.As their rivalry slowly becomes something neither of them expected, secrets from Seo-jun's past threaten to destroy the fragile trust between them.Sometimes the person you hate the most is the person who understands your heart best.But can they stop fighting long enough to find out? annoying her. From the moment they meet, the two can't stand each other. Every conversation becomes an argument, and every encounter turns into a competition.But when their professor unexpectedly pairs them for an important university project, avoiding each other is no longer an option.Forced to spend time together, Ha-eun begins to discover that there is more to Seo-jun than his cold attitude and perfect reputation. And Seo-jun starts to realize that the girl who challenges him at every turn may be the one person who actually sees him for who he is.As their rivalry slowly becomes something neither of them expected, secrets from Seo-jun's past threaten to destroy the fragile trust between them.Sometimes the person you hate the most is the person who understands your heart best.But can they stop fighting long enough to find o