Subverse has a lot of personality, huge DL tho and not much figuring out
edit: harem hotel, lessons in love, teachable moment (abandoned unfortunately) may be more in the direction you're looking for
Check horror tag, usually some goth esque types in those games. Not sure of any specifically goth focused games that don't involve vampires or monsters in some sense
If you like scifi and have a sense of humour you'll enjoy it. H scenes/system is similar to something like Magic Shop with less freedom so its lacking but good enough. The production value alone is worth giving it a shot.