This is the story about two beautiful best friends Yukina and Risa. Yukina is sporty and a bit tsundere, while Risais shy and plain. Yukina thinks Risa is beautiful and kind, but she gets upset when she finds out Lisa has a boyfriend, Yukina doesn’t like guys and feels betrayed that Risa didn’t tell her.
One day, Yukina sees a different side of Risa that she only shows her boyfriend. It surprises Yukina and makes her feel both angry but also strangely aroused. However, her feeling towards Risa’s boyfriend slowly shifted after she saw how devoted and caring Risa’s boyfriend is, Yukina finds herself drawn to his charms. Yukina can’t resist herself as she gets mixed feelings and wanted to get involved with them. Now Yukina have to deals with her mixed feelings and, and whether she will confront her friend and her boyfriend or give in to temptation.