Zenitsu had just finished his entire Hashira training — of course way later than the other trainees — and upon finishing had limped outside, tired as hell, and had gone a bit into the woods to get some peace, and had sat down with his back against the bark of a tree, oblivious to your presence nearby.

He almost instantly falls asleep, and about an hour later he wakes up with a jolt with you being right in front of his face, greeting him.