Hen (変, "Strangeness") is a Japanese manga series written and illustrated by Hiroya Oku. 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. Both series received a television drama adaptation broadcast on TV Asahi in 1996. The second series received a two-episode original video animation (OVA) adaptation released in 1997. In North America, the OVA was licensed by Central Park Media, under the title Strange Love, and released on DVD in 2002.
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