Hikikomori Hakoiri Reijou no Kekkon
引きこもり箱入令嬢の婚約
At a formal event hosted by the monarchy for 17-year-old nobles, an unusual wooden box sits among the opulence. Only the second prince, Cyphon, is drawn to it, examining it with interest. A voice then emerges from inside the box, asking if he needs anything. This fantasy romance centers on a noblewoman who has been isolated and lacks social experience, and a prince.