Kaze no Tategami

Sou and Hazumi were raised like brother and sister. Then, one night, a strange light flashed in Sou's eyes, and he disappeared. Four years later, Hazumi spots someone who looks just like Sou in a magazine. Determined to solve the mystery, Hazumi takes her fox puppet and heads to Tokyo... Get ready for a magical, suspenseful love story!

(Source: Manga Reborn)