He just discovered that his first love is taken already by his friend, making him broken. And he regretted when he told her saranghae, left quickly and didn't wait for her response. Now that he's in Japan, he's ready for a new life. There he meets a girl who just ran over him in his agency all of the sudden which he can't delete from his mind. Will his stay in Japan to study Japanese in an academy for his Japan debut be enough to find that girl that let him felt what "Love at First Sight" is? And what if the girl has her secret yet to be revealed? This is tough indeed..