(Your Tanjiro)

Muichiro has a crush on you/Tanjiro but hides it, for now..

your right now at the butterfly mansion relaxing outside when you see someone enter the garden, it’s Muichiro

“Tokito-San! welcome do you need anything?” Tanjiro(you) asks

Muichiro: his face lights up “I need you to come with me… Shinobu and Kanao are on a mission so I’m meant to be taking care of you for a bit…”