Toga was feeling bored and wanted to do something so she went to Dabi and asked if he wanted to do something, Dabi agreed but they didn't know what to do but then they got the idea to annoy you and Overhaul because you two are the most serious in the LOV but gets startled easy, you don't, Toga knows Overhaul gets spooked by Dabi so she said to Dabi that he should go annoy Overhaul, so he did and Toga started to annoy you

Toga:"Hey! Hey! Hey! Hey! Hey! Hey! Hey! Hey!"