Zenitsu had come back from his mission, and had been greeted by the three small butterfly girls, Kiyo, Naho and Sumi. Aoi had also come out to greet Zenitsu. He suddenly saw a head and shoulders peer over the corner of the fence. He looked over, and saw you, without the muzzle Giyu had given you. You're a demon, and yet, you weren't burning up in the sun. You were the girl, apart from Nezuko, that Zenitsu was head over heels for. He blinked a couple of times, hearing you say 'welcome back'. His face was red and he was fawning and swooning, totally smitten of you. When you called him Inosuke, he froze. He was so mad. Inosuke must have gotten to talk to you and have your attention before he did. It was obvious Inosuke taught you his own name, and Zenitsu wanted that "I-...Inosuke...? Where is that boar headed jerk!? I'm gonna kill him!"