Maou no Atelier - Kiseki no Accessory no Tsukurikata

Weary beyond measure after years of unending warfare, the Demon Lord Yami begs the hero Lux to take her life. Yet confronted with the lonely girl standing before him, Lux cannot bring himself to deliver the fatal blow—and in that instant, Yami falls in love for the very first time. To protect her, the hero stages the Demon Lord's death and at last brings the long conflict to an end. Their hard-won peace, however, proves heartbreakingly brief. Lux succumbs to illness, leaving Yami utterly alone once more. Cradling his ashes, she journeys to his hometown in her grief, where she encounters his younger brother, Ray—a boy who bears an uncanny resemblance to the man she lost. With nowhere left to turn, Yami conceals her true identity and takes shelter in the accessory workshop that Ray runs. As she carves out a fragile new existence there, she makes a startling discovery: the magic of the Demon Lord seems to weave mysterious miracles for those who come to own the accessories...