@goodie-bag It's possible, but that wouldn't be my first guess. Her dialogue uses 赤 (aka), the word "red," when the protagonist's name from Pokemon is written レッド (Reddo) in katakana, so I don't think it was intended as a reference to that.
I don't get it. Why 3rd player even need in the first place ? She just want him to look at her panty right
And for the red thing. My guess is her panty color. She saw it once. I mean they try show of panty today
I guess red means color of Nishihara's underwear.
When Ueno asked her to wear something to cover her underwear, then Nishihara sensed what Ueno was thinking.
But Nishihara carelessly said that she matched red underwear set.