Takeru Hidaka is a driven high school student with his sights set on medical school. He has just begun dating his first girlfriend, Kaori Koga, and from the outside the two look like a perfect match. That calm is shaken when Kaori's best friend, Tomoko Yoshioka, starts flirting with Takeru and trying to seduce him. Torn between his loyalty to Kaori and Tomoko's advances, he slips into a secret double life. As the lies pile up, both his hopes for medical school and his relationships are put at risk, and the fear of being found out never leaves him. The result is an ecchi romantic drama built around temptation and betrayal.