Kakkoyoku No Yome Vol. 18 — Manga Raw / Buy Official

Volume 18 plunges into the core of Nagi and Erika's cohabitation, where the thin line between blood ties and romantic desire finally dissolves. Nagi finds himself trapped between his academic ambitions and the political marriage orchestrated by Erika's father. However, Erika’s hidden desperation to keep Nagi by her side surfaces, revealing more than just rebellion against her family. Meanwhile, Hiro breaks her perfect facade, confessing her love with tearful sincerity that leaves Nagi speechless. Not to be outdone, Sach approaches Nagi during a private moment, blurring the boundaries of their sibling relationship even further. As their tensions peak during a group trip, Nagi is forced to make a selfish, painful choice that refuses to spare anyone’s feelings. The climax arrives when Erika finally confronts Nagi, abandoning all pretense and redefining the very nature of their connection. There is no going back; they are no longer just fated strangers, but souls irrevocably bound together.