Kurotsuki Takuma, a high school boy with excellent grades and athletic ability, was always alone at school. His peaceful daily life is drastically changed when Izayoi Alice, a beautiful half-Japanese, half-English transfer student who calls herself his future wife, appears in front of the high-spec, lonely Takuma. The extremely yandere Alice takes every possible measure to make Takuma her own, and she is rapidly closing the gap between the two. “Hey, is it my imagination that the paper you gave me to sign and seal is a filled-out marriage certificate?” “No, don’t mind it” “No, of course I do.” How is the fate of Takuma, who has been completely locked on by the yandere Alice, ……? (It seems that he will never be able to escape from her again.)