V na Imouto no Love Song

Yamato, who has been trying to make a living as a freelancing musician since graduating from high school, has to move in with his reclusive step-sister, Rinne, due to his parent's remarriage. When Yamato finds out that Rinne is a V-tuber, he decides to write a theme song for her. When he looks up her videos for musical inspiration… "Kon-Mikua ♥ 'Ryugu Mikua' here, ya! I'm still learning how to be a good girl, so please keep on supporting me ♥" It's a red-hot comedy with a step-sister who has the biggest gap between her real and virtual faces! (Source: Square-Enix, translated)