[Touken Ranbu: Reverse Isekai] Protect

They meet, come to know each other, and stay by each other's side. ...None of that happens. All there is is a protection no one knows about. I will protect you until the very end. The girl is just a supporting character. The protagonist, told from the first-person perspective, is the little angel Kiyomitsu! Little angel Kiyomitsu, you have to believe me. You're the one I love most, qwq Theme: