Ah. Well, your title is a bit misleading. I thought you were looking for novels where there’s a romance between the MC and the system.
By system you mean quick transmigration host system? or gaming system? PS Please make your reading list public.
The Anime Trope System: Stone vs Viper. But sadly its on Webnovel but thankfully its not on privilege because the author is a genius
Well, there is “Reborn As A System,” where the MC is the system and the host is the ML. It’s BL, btw.
I literally can't read one that isn't like that so I avoid the word system. I seems people like this dumb banter between man and ai.
Shinka no Mi If you mean doing tsukkomi with system Almost every isekai otome game if you mean fighting the system (in-game storyline) example : akuyaku reijou ni koi o shite, death flag show no sign of ending
"Perfect Destiny" and "Quick Transmigration, I'm Almost Dead" have hilarious MC and system interaction.
If its system and host arguing, "Quick Transmigration System: Male God, Come Here". MC and system in here have quite hilarious banter.