Out of curiosity I clicked on the "sequel" manga... and then on that one's "sequel"... and then...
...they just kept coming. This setting has a chain of sequels over 12 volumes long, it would seem. I feel like that's the longest I've ever seen though?!
...Most of the sequels look racy and scandalous and terrible. Is this the yaoi equivalent of Harlequin novels, I wonder—cheap beach reads...? I have absolutely no interest in them at all, I'm afraid.