Yeah if you grab the panties, when Aki, Yui, and Perrine show up to discuss Aki's trying to kill you and what motivated that, Perrine happens to notice the panties and it goes from a very serious scene to borderline hilarious. First time I played it I grabbed the panties because my train of thought it "there's gotta be some reason for it being available to take, right?" (been playing adventure games for years and years) and it's really interesting how things pan out when you do or don't do something!