Love Plus is a Visual Novel / Dating Sim, got a sequel on the 3DS and apparently there was some kind of App[1]? So enough traction for that at least. Japan-exclusive (and probably not really compatible with the European or US market as a retail title, IMO).

There is definitely no AI in there apart from if-else trees, at least in the original games - the DS is super low power.

[1] https://love-plus.fandom.com/wiki/Love_Plus_Every