Two girls of the same father were brought home by their father to live together. The younger sister's natural pride made her resent her older sister's existence. An intern college student who suddenly transferred to his sister's school subtly changed his sister's rebellious character, and also made her fall in love with her mistakenly. And that college student came to this city just to find his childhood sweetheart. No one knows the relationship between the three until all the truth is revealed. A love story that happened on campus and in society happened quietly...