Right so new AU: Pillar AU.
Nezuko and Genya (plus others but this is their time rn) are pillars, and like Giyuu and Shinobu, often paired up.
Sanemi doesn't really like Nezuko, but she's nice to his brother and hasn't actually done anything to him so he's just super grumpy.
Nezuko (Star Pillar) is the only girl that doesn't scare Genya (Gun Pillar?? Storm Pillar??), and he's most cooperative with her and her brother, but Tanjirou (Sun Pillar) is already Kanao's (Flower Pillar) partner.
Nezuko's just happy to make new friends, and is curious as to why Genya skips using swords most of the time and pulls out the guns.
(Nezuko is SunProof, but is most powerful at night, hence, Star Pillar, since she modified the Fire Techniques and water breathing.)
