HenHen.

Hen (変; lit. '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.