Watakushi no Koto ga Daikirai na Gitei ga Goei Kishi ni narimashita
My Foster Brother / Who Hates Me / Has Become a Guard Knight / Watakushi no Koto ga Daikirai na Gitei ga Goei Kishi ni Narimashita: Jitsu wa Dekiai sareteita tte Hontou nano?! / わたくしのことが大嫌いな義弟が護衛騎士になりました / わたくしのことが大嫌いな義弟が護衛騎士になりました 実は溺愛されていたって本当なの!? / 超级讨厌我的义弟成为了护卫骑士

Willemina, a duke’s daughter, struggles to apologize to Nigel, her foster brother, after treating him harshly for years. When Nigel unexpectedly joins her family, Willemina believes he is her father’s illegitimate son and is cruel to him. Though she eventually accepts him, she cannot bring herself to apologize. Years later, Nigel becomes her guard knight, but his feelings and the truth of their relationship are not what Willemina assumes.