"Don't you feel ashamed in front of your mother, who spread her legs to give birth to you?!" Several decades have passed since dungeons appeared all over the world. As dungeon streaming, broadcasting exploration footage, gained popularity, ojou-sama streamer Yamada Karin finds herself downcast over her rock-bottom status: zero viewers and only three subscribers. One day, Karin encounters a nuisance streamer trying to broadcast himself blowing up a dungeon wall. After thoroughly beating up this guy, who's secretly the strongest rising star, Karin goes viral as the delinquent ojou-sama...?!