Description:

Lydia, the daughter of a count, reincarnated in an otome game, "Easy Love Simulation Reincarnation System." Life should have been easy… However, because she changed the god's scenario, she has no luck?! With two failed attempts at marriage, worried about finding a decent man to marry, a black knight, who misunderstood that she was looking for a "sacrifice" for drug experiments, came?! (Source: Ichijinsha, translated)

Alternative Titles:

男運ゼロの薬師令嬢、初恋の黒騎士様が押しかけ婚約者になりまして。, Lady Healer With Zero Luck With Men. Her First Love, a Black Knight, Is Now Her Unchosen Fiancé., 남자 운 제로인 약사 영애, 첫사랑인 흑기사가 밀어붙여 약혼자가 되었습니다