In that beautiful spring filled with cherry blossom petals, I met her. The girl with a bright and cheerful demeanor. "300", a cold-looking number floated above her head, and there, I know of the time where she will meet her demise. This is the story of my everyday life with her until the day we parted. (Source: Fujimi L Bunko, translated)

https://www.cmoa.jp/title/318302/ “It doesn’t matter who I am. I believe in my own destiny—” Hinako, a college student who lived her days trying not to stand out, suddenly finds herself in an unfamiliar world, pinned down by a strikingly handsome man. As she reels in confusion, she feels the cold stares of everyone around her and hears the word “Kuroimiko” directed at her. Frightened, Hinako is told by the man that “I will protect you no matter what,” and he even declares that he will make her his wife. In truth, he is a king feared by the people— An otherworldly love romance between an ominous king and a serious, earnest girl!!