I'm of the same feelings as you! I own the whole series and have read and reread so many times it's so damn good! I really believe there will never be anything like it. I originally watched the anime, then started buying the books and now I pretty much hate the anime because it does the manga such a disjustice. Again, I don't think anything will be like SDK but if we have similar taste in anything else you might enjoy 'I Choose the Emperor Ending'. It's on here but I'm all caught up and will start to support it on Tapoytoon as it updates. I haven't laughed as much as I have with this one in a while!
I know it’s been a year, but seriously read Berserk. It’s not even close to this, but a whole other level. Awesome art and character development with the main character Guts reminding me of the lonesome and badass Kyo, so give it a try if you like fantasy, action, horror and seinen manga
GUYS,
THIS MANGA HAS ALWAYS BEEN ONE OF MY FAVORITES. IT'S IRREPLACEABLE AND UNFORGETTABLE. I HAVE THE WHOLE COLLECTION. I WISH I CAN FIND ANOTHER MANGA THAT IS SIMILAR BUT TO MY DISAPPOINTMENT IT'S ONE OF A KIND. I LOVE KYO'S BOLD AND RESERVEDNESS ALSO YUYA'S SWEET BUT BRAVE HEART!
IF YOU GUYS HAPPEN TO FIND ANYTHING THAT COMES CLOSE PLEASE LET ME KNOW! CLAPS HAND!