2girls, d, arm_up, armpits, blue_eyes, blue_hair, blue_nails, frills, green_hair, hair_bun, hair_ornament, holding, holding_microphone, honkai_(series), honkai_impact_3rd, idol, liliya_olenyeva, long_hair, microphone, multiple_girls, music, nail_polish, open_mouth, pink_hair, pink_nails, purple_background, purple_eyes, rozaliya_olenyeva, shorts, siblings, singing, single_hair_bun, smile, stomach, summer_uniform, tail, thigh_strap, thighs, twins