Characters aren't mine they all belong to demon slayer! This is a modern au and there will be smut in some of the chapters. Sanemi is a new teacher at the demon slayer academy. During his first day he meets Giyu Tomioka and instantly falls in love with the beautiful Man. Shinobu sees sanemi talking to the receptionist and decides that she would have Giyu make the new tenet being sanemi a welcoming gift. Giyu reluctantly agrees and makes so ohagi for the knee tenet. After that they start passing notes between eachother not bothering to exchange numbers. They decided every week they'd give hints about what they looked like and what kind of person they are. Meanwhile back at the demon slayer academy. Sanemi the math teacher flirts with the P.E teacher. Giyu tomioka. Little do they know, they both know each other more than they thought. What happens when sanemi says something in one of his notes which made Giyu instantly know who his pen pal is the next day. What kinda bond will these two share.