niji (nijioki), fujiwara no mokou, houraisan kaguya, imperishable night, touhou, looking away, silver hair, bad id, bad pixiv id, 2girls, averting eyes, black hair, blouse, blush, collarbone, collared shirt, female focus, from behind, long hair, long sleeves, looking at viewer, looking back, looking to the side, multiple girls, pants, red eyes, shirt, simple background, sweatdrop, upper body, white background, white shirt