First, I'll look up "Ryuurouden Ouha Rikkokuhen" to see if there are any existing sources or if this is a newly released chapter. Since the user mentions "raw chap 73" and "welovemanga upd," it's likely related to scanlation groups or unlicensed manga sharing platforms. I need to ensure that the information I provide is accurate and doesn't promote piracy since that could be a concern.