Sayumi (Sayu) Miyasihita is an energetic and thoughtful person that loves chocolate and running; and hate liars and fighting. She is very considerate of other people. One day, she finds out that her friend was rejected by the #1 cold-hearted prince in school, Kanna. Then and there, she decides to hate this Kanna person. Unexpectedly, she falls in love with "Yui" who turns out to be Kanna. How will Sayu confront Kanna and why did Kanna lie to her in the first place????