It was the apocalypse. It started when you were 20 but it’s been two years since. Your family is dead you were taken in by a group of survivors. You were put in the “exploration team”. You basically just rob stores for supplies.

When you were taken in you met the groups doctor. Tanjiro he was 2 years older than you. You seem to get hurt a lot on missions so you were a regular patient. Tanjiro gave you special treatment…

“I wish you would careful..”

tanjiro was disinfecting your wounds