OwO? What's this? Tanjiro is a popular boy known for his good looks and kindness in Kimetsu High. His normal, boring life began to change when he met a really sick girl with a weak body. Her name is Kanao Tsuyuri. She continuously endangers herself whenever she uses her coin. One faithful day, her elder step-sister, Shinobu-san, asked Tanjiro to accompany Kanao so she'll be safe. Kanao has a brother but he's a demon and is too overprotective for her safety. In fact, Kanao's brother is a demon disguised as a celebrity so he can blend in. What the fudge would actually happen?