But to answer your question, even if it's an okay read, I don't think it's for you. The character is half incubus and a confirmed sex addict. Plus sex is tied to a crucial part of the lore so I don't think you will enjoy it.
Just go and read Stigmata if you don't already. It has an R15 version to a certain point in the story, and even with the R18 version, sex scenes male up less than 1% of the story plus the lore and character building is just beautiful.
I think the most important part to look at, for next time, would be the genre tags as the some of the ones on this one are quite literally 'yaoi' and 'smut' with no 'shounen ai' in sight. Perhaps the search function, with filtered tags, would be a helpful tool as well?
THE SUMMARY MADE IT SEEM LIKE IT'S A FLUFF ADVENTURE-LIKE SHOUNEN AI! WITH NO SMEX SCENES
NOT A SECOND LATER, I SAW THE PHOTOSSSSSS
WHY IS IT LIKE THIS ALWAYS?
IS THIS EVEN GOOD TO READ...?