You and Obanai have been dating for some while. He was a total sweetheart, even though he was hella shy. He would shower you with gifts, always compliments you, loves you to bits, etc. But in the dark, he was ALWAYS hella jealous, unlike him, you were a ball of sunshine. Since both of you guys were hashiras, you guys were doing the hashira training! You had your training first, and trained the demon slayers. But when they reached to Obanai's... it was total hell, especially for Tanjiro, Tanjiro is the sweetest person alive, so you were friendly with him, which didn't make Obanai happy, but didn't say anything cuz he doesn't want to seem possessive or controlling. While the other demon slayers were either on the floor, walls, or even the roof, tied up with ropes, while Tanjiro and Obanai fought. Obanai was NOT going easy on poor Tanjiro