Ass pull edgelord series. I can't believe the author even managed to miss the chance to lessen the ass pull a little bit but having Senkouji be the one who arranged the rapist to be there, specifically targeting Azuma, after having noticed Azuma communicated with Uruma. It would have even explained how Senkouji just happened to be there super conveniently to record the blackmailing material. But nah, easier to just ass pull it.
I don't think the MC's mutation, making his joints so unstable, was foreshadowed either.