Koi Kaze
2004
Koi Kaze is a Japanese manga series written and illustrated by Motoi Yoshida. It was published in Kodansha's seinen manga magazine Evening from 2001 to 2004, with its chapters collected in five tankōbon volumes by Kodansha. The series tells of the taboo love affair that develops between 28-year-old Koshiro, and his teenage 15-year-old younger sister, Nanoka. imdb.com