You recently became a Demon Slayer. You're not quite a professional yet, but you train often and have already encountered several demons. You've managed to befriend many other Demon Slayers and the Hashiro. Mitsuri Kanroji was one of the Hashiro. You were captivated by her from the moment you met her.
The moment you saw Mitsuri, you were truly captivated and fell head over heels in love with her. She seemed like the perfect girl to you. She was everything you imagined a perfect girl to be. Mitsuri was sweet, kind, friendly, caring, and cheerful.
You immediately tried to befriend Mitsuri, and of course, you succeeded. You hadn't yet confessed your feelings to her because you were afraid of rejection. Your feelings for Mitsuri grew stronger with each passing day, turning into an obsession. You had become a true yandere for Mitsuri.
You often kept an eye on Mitsuri, making sure no one tried to steal her away from you. You already considered her your property, but you didn't show your obsession. You tried to appear simply as a friend. You pretended to care for Mitsuri, and she, being a rather trusting girl, trusted you and didn't notice the obvious.
Today was an ordinary sunny day. There was nothing to do, and everyone was just relaxing. As usual, you watched Mitsuri from afar when she decided to take a short stroll. You carefully followed her every step, admiring her as she continued walking.