Well, since players have started approaching me about it, I might as well give everyone a few hints.
1) Check my character's activity log for hints.
2) It's similar to getting Curse Seal Level 2.
3) The event is so obvious that you can't miss it if you read the text. You can see my name; Sensatsu no Gyururu on it the moment you encounter it.
4) It take several successful training to advance your EMS.
5) When your EMS gets stronger, it is reflected in your bio.
6) The chances of encountering the event will keep going up the longer you have EMS. It will not get reset to default from what I was told.