Miyuki

is a Japanese romantic comedy manga series by Mitsuru Adachi. It was published by Shogakukan from 1980 to 1984 in the biweekly manga magazine Shōnen Big Comic (precursor to the current Weekly Young Sunday). The series was adapted into a movie, an anime series, and a live-action TV drama. It was one of the winners of the 1982 Shogakukan Manga Award for shōnen and shōjo manga, along with Adachi's Touch.

Plot
16-year-old Masato Wakamatsu is working at the beach one summer. Having made a bad impression on his classmate/crush Miyuki Kashima, he makes a pass at another pretty girl. To Masato's shock, the girl turns out to be his younger stepsister Miyuki, who has been living abroad with their father for the past six years.

As school progresses, Masato starts dating Miyuki Kashima. He and his sister Miyuki are living alone together, and he is troubled by his conflicting emotions: filial and romantic feelings toward a sister who may or may not know she is not related to him by blood.