Tyrant was the second Yaoi I ever really paid attention to. I used to pick up yaoi books and flip through them for the pretty pictures, but one day I was surfing a website called tvtropes.org, and came across their article on Tyrant. After reading their explanation of the manga, I was already hooked. The idea of role-reversal and the fact that Tatsumi was the biggest homophobe in existence just seemed so appealing. So, I found a download, and began to read.
Even though I had never read Challengers at the time, I've read it now, it wasn't hard to follow. She did a good job of making it a separate story, and anything that needed and could get an explanation got one.
I've noticed people here mentioned a lack of character and plot development. Throughout the volumes I have been able to get scanlations or page summaries for, I'd like to say that they're wrong in my opinion. Taking in mind the characters themselves, no, this plot would not move into a 'perfect relationship' in three books. Tatsumi is the kind of person who would purposefully drag out an awkward relationship with Morinaga because he can't stand the thought that he might be a homosexual. He has a very immature and close-minded view about the whole situation. So, while their relationship and plot development may be slower than normal yaoi manga's, there are little things along that way that show things are either improving or failing in one way or another along the way. The author doesn't shove them in your face or put large, blinking signs at them. You have to look into their dialouges and such in order to find them. I find this more realistic than most yaoi, because in real life most people never just out and say things.
One thing I find VERY appealing about this manga is that it's NOT every other yaoi out there. I have read my fair share of yaoi, and I have never found one as different or great as this. Tatsumi is not just suddenly in love with Morinaga after being, essentially, raped by him, but he also doesn't wish his horrible bloody death for the rest of his life. Sure, he wishes it at SOME point, but that just adds to the reason why this book is so great. Whenever I get tired of the conventional 'girly', 'easily influenced' and 'fragile' Uke (which is a lot. it's like reading bad shojo stereotypes), I turn back to this series. It's not everyday you find a series where the Uke is a violent tyrant!
It's very easy to feel for Morinaga, which I find great because it emotionally connects you to a character. You can watch how Morinaga slowly encourages Tatsumi to more or less stop running from his emotions, and in the meantime gets beaten up or yelled at for doing just that. It's a harsh thing to be involved in, and I believe it's pulled off beautifully. Tatsumi is sometimes violent towards Morinaga, true, but it's not to the point where he just beats on him because of who he is. He has to be provoked (usually with the truth...), and even then it's usually just a punch or a death threat.
This story is also riddled with hott sex scenes, and very hilarious moments. (Either at the hands of Tatsumi, or some stupid misunderstandings) The art and anatomy is PERFECT; I could stare at it all day.Some of the sex may seem a little random, but each time it happens something changes a little in their relationship. It's not usually very easy to see, but sometimes it's more prominent that others.
I HIGHLY recommend this manga to ANY fan of yaoi. The plot keeps you hooked to make you want to see when everything might change a little for the better, and the characters are easy to read and understand. At Vol.5, I do not believe Tatsumi is anywhere near directly telling Morinaga he loves him, and the frustration to finally hear it keeps it completely enticing.
If you only enjoy very fast mangas that include the love-confessions in like, the 3rd chapter, I would NOT recommend this manga.