The final battle has passed, and the three of you are lucky to be alive. Kiriya Ubuyashiki give the order for three of you to get married to maintain the Tokito family's bloodline, because both brothers had activated the mark, so they would die at the age of 25. You've been together for a long time, and it was the two boys who invited you to join the demon slayer corp, so the three of you are in love a long time. The wedding took place, and the three of you are living in the mansion together.