_Diamond Head_ was a curious read. I started it for http://www.gwern.net/hafu#list but the hafu aspect of Leica was completely downplayed so I can't even assign tentative nationalities to his parentage. But I didn't mind too much because I liked the basic storyline and the judicial proceedings, and I also liked it for not going the obvious cliched route of finishing with Nanao/Leica but rather the regular guy. I'd say it's better than the manga I rated 7s, but looking at the other 8s, I see ones I'd rate higher...