Board Thread:Theories Discussion/@comment-26160852-20160507161950/@comment-108.209.88.69-20160516062804

ToT is related to EC, the reason it is not actually widely known is because Mothy did not actually put any solid implications of the connection that they were till the Third book [Ring/Circle of Evil] and actually also in the [Bonus/Extra Story]s on the offical website for ToT.

Amo-kun tells Rack the [Story of the Princess and her Servant] if my memory serves me correctly, which is basically the Story of Evil. He does this coincidentally at Twilight. Implying a good amount along side it that Rack is Rillaine, and Amo being possibly Allen.

There are other implications also found such as Master of the Graveyard appearing, the Seven Deadly Sin Vessels, one chapter is titled [Black Box], The kingdom in the series worships the [Sun God] and their kings have the name Helios, 72 Daemons, Pere Noel appears in the Bonus story, Lots of magic references, The Glass of Conchita, Keywords on the official site, [her] is actually explicitly referenced concerning two characters.

But this is all from translations that only one guy really talked about, and its all buried in lots of japanese sites, though the Eastern fandom tend to talk every now and again on that stuff.