soidesu (pixiv), soudesu (pixiv), kagamine rin, megurine luka, vocaloid, 2girls, age difference, black one-piece swimsuit, blonde hair, blush, breasts, covered erect nipples, flat chest, flat chest grab, grabbing another's breast, groping, hair ornament, hairclip, height difference, loli, long hair, multiple girls, one-piece swimsuit, onee-loli, pink hair, school swimsuit, short hair, small breasts, swimsuit, towel, yuri