Yuma Onozuka, a university student attending a dental clinic, is scouted by his doctor, Rintaro Higashi, to work as a dental assistant. Yuma is resting in the locker room on his first day at work when Rintaro suddenly kisses him through his mask.. Ever since that day, I was confused when Rintaro told me that he was my type, but I was gradually drawn to him by the professional attitude that he showed while working. One day, Yuma ends up staying at Rintaro's house due to a water leak in his apartment...!