This is a Sanegiyuu story, modern au, and here are the ships: Sanemi x giyuu (ofc main ship) Genya x muichiro Douma x akaza Tanjiro x zenitsu Sabito x makomo Tsutako x kanae Nezuko x kanao Gyutaro x Kaigaku Daki x Nakime Obanai x mitsuri Uzui x Rengoku (I to give this ship a try, as respecting its shippers :D) Enmu x rui Giyuu is an P.E teacher in the kimetsu academy, in the other hand Sanemi is the Math teacher there.