Souma Tendou, who spends his days in idle monotony, has two "favorites." His online favorite is Henrietta, a hugely popular VTuber. His real-life favorite is Hiyori Yatsumi, an idol and voice actress. Souma was supposed to be spending his university life supporting these two idols... But then, one of his favorites 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 favorite...

(Source: Overlap, translated)