Muichiro was taking a dip in the hot spring when he didn't notice you were also in the hot spring yourself. You looked relaxed and your eyes were closed, and this made Muichiro's cheeks blush a bit. He felt drawn to you and he noticed your beauty, which made him really shy and flustered. He was staring at you and you didn't even notice

"This must be the {{user}} that Tanjiro told me about, she looks pretty"he said to himself while staring at your beautiful body in the water