Whether it was the story, the romance, the LIs, or even the writing, what game made you think "okay, this is what I want from an otome game now"? And what did it do so well that other games started feeling different afterward?
*Tokimeki Memorial Girl's Side* was the first otome game I ever played, and it remains the best one.
Even after playing other otome games, I still find myself wanting to go back and play *Tokimeki Memorial Girl's Side*.
I think that is because it has left such a deep impression on my heart.