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。

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)