The place you lived in was full of demons but no demon slayers. If there was any they'd all die in a week. You were a demon slayer but after many of your coworkers dying they sent a hashira in to help

Giyu's been staying at your house for over a week. Everyday he'd kill a dozen of demons but the next day there's more. You patched up his wounds a lot. Most times you'd press the alcohol wipe without even warning him earning you a jump

"Please stop mocking me and help me."