Well, I think "drama" is subjective as a whole. Some people consider no conflict drama-free while others just consider some conflict as a story furthering rather than just "drama" for the sake of drama. (. ❛ ᴗ ❛.)
Normal love interest without any fantasy elements to a game is completely a-okay with me. I enjoy the TMGS series which is just a school life game and they're one of my favorite series of all time.
If you're talking about slice-of-life where it's just sweet moments in a game, I can definitely see the appeal as episodic type of game. I think it would be really cute where it's just dates, meetings or milestones in a relationship. **♡( ⁎ᵕᴗᵕ⁎ )
I do see the issue of how can you develop a fully fleshed out game with a cohesive storyline without ANY conflict. I, myself, cannot see how to write without any conflict or friction to progress storylines or emotional growth after overcoming or succumbing to issues arising in a plot. ༼ σ ‸ σ ༽
But hey! Maybe someone has the idea and the talent to prove that a wonderful game can be created as such one day, if they haven't or are already working on it at this moment.
˙˚ଘo(∗ ❛ั ᵕ ❛ั )੭່˙