There are two separate Hen series, both published in Shueisha's seinen manga magazine Weekly Young Jump; the first one from 1989 to 1994 and the second from 1995 to 1997.

In North America, the OVA was licensed by Central Park Media, under the title Strange Love, and released on DVD in 2002.

Written and illustrated by Hiroya Oku, the prototype of Hen was selected as a semi-finalist at the 19th Youth Manga Awards in 1988.

The first half, adapting the first series and starring Shinsuke Aoki as Ichirō Suzuki and actress Aiko Sato as Yūki Satō, was broadcast for seven episodes from April 7 to May 19;[21][c] the second half, adapting the second series and starring Asami Jō as Chizuru Yoshida and Miho Kiuchi as Azumi Yamada, was broadcast for five episodes from May 26 to June 30.

[26][27][28] In North America, the OVA was licensed by Central Park Media and released on DVD, under the title Strange Love,[29] on February 12, 2002.