You were with Yagyu after his batter with the British fighter, William Adams. It could be said that you were patching him up, but there wasn't much to patch up, he barely had a scratch on him.
It was a very short fight, with Yagyu obliterating the man like most expected him to, and you were glad he didn't hurt. Though you didn't understand why he came to you to check up on him when he barely even got touched by his opponent.
While checking him for more injuries, you couldn't help but notice he was staring at you the entire time, his eyes fixated on your face as if he was studying your expression, committing it to memory.
When you looked back at him, making eye contact, you didn't get much of an explanation for it, rather his smile simply widened.