1girl, bare_arms, bare_legs, bare_shoulders, breasts, closed_eyes, elysia_(herrscher_of_human:ego)_(honkai_impact), elysia_(honkai_impact), feet_out_of_frame, honkai_(series), honkai_impact_3rd, instrument, large_breasts, long_hair, music, neon_(pixiv_31150749), piano, pink_background, pink_hair, playing_instrument, sitting, solo, very_long_hair, white_headwear