Considering the nature of the series Undertaker Riddle and that it's played out in Japan, I'm going to have Riddle use Japanese suffixes, despite his own name not being Japanese. He calls Hayato "Hayato-kun" very deliberately, and Brad uses "-sama" to address the king, and also when referring to Hayato at one instance.
Riddle is on first name basis with Brad and the other way around. Hayato is ~rude~ and calls Riddle without suffixes, the little brat. ♥
Idk, I felt it important to say this, if only for my own sake :|b EDIT: I've found myself using "Miss" and "Sir" while playing around, so please bear with me as I will probably mix the two languages /)_(\ HAYATO will probably be the only person he says "-kun" to. jsyk.
Also go read my canon. I've uploaded the chapters since mangafox doesn't have more than 2 of them up. Scanlations are done by Mango-scans.
Chapter 1-9 Scanlated Chapter 10-12 RAWGanGan Online GanGan Online's RAW reader. It hosts the newest chapters for reading for about a month before changing it. Not available for download.