Tendou Souma, who spends his days in idle monotony, has two "idols." His online idol is Henrietta, a hugely popular VTuber. His real-life idol is Hiyori Yatsumi, an idol and voice actress. Souma's university life was supposed to be centered around supporting these two idols... But then, one of his idols unexpectedly moves into the room next door!? Excited by this dream-like turn of events, Soma is thrilled, but what he discovers is the disappointing true nature of his idol...