~love of a yandere~|a yandere!tanjiro×female reader|

y/n was a very strong demon slayer. she became a hashira in just half a month of joining the corp. she grew up with tanjiro since she lived in the town at the foot of the mountain that he lived on. she hadn't seen him since she was 12, and he was 10. the two of them started talking again and quickly became close once more, even closer than when they were kids. she noticed he started acting differently than when they were kids. he was always protective of her when they were younger and absolutely hated it when she wanted to play with other kids. he didn't grow out of that. in fact, he got worse. will she be able to safely navigate through this dangerous game, or will she fall into darkness? read to find out.