Missing novel 2: Letter of Misfortune is written by Gakuto Coda.

Confident and knowledgeable, Kyoichi Utsume would be intimidating even if it weren't for his dark and mysterious past - or the ever-faithful presence of other-wordly Ayame. But even Kyoichi is disquieted by the curse that has befallen his friend Aki Kidono. Magic rituals, family secrets, and internal conflict mix together in a wicked brew - and it falls to Aki's friends to free her from her curse and the demons that surround her.