I'm not sure you'll find much out there that has a similar tone to Caribdis' work; he's rather unique in that manner. Two games I can think of right off the top of my head that are also made with Honey Select are The Inn and Deviant Anomalies. The Inn is probably closest to Caribdis' work humor-wise, so that'll probably be your best bet, but there's not much content currently available in it's present release, though there's a new version that will be available to the public shortly. Deviant Anomalies has some dark themes punctuated with humor like what Caribdis does, but it's protagonist is more morally grey and sometimes an abject asshole, so it's not for everyone. If you're looking for other good Honey Select Games, my favorites are Pale Carnations and House in the Rift, but those two are radically different plot and tone-wise, especially Pale Carnations which is an MC dealing with a less-than-ethical BDSM prostitution ring, so proceed with caution. House in the Rift is a nice mellow slice-of-life story though, so you might like that one.