1girl, bare_arms, bare_shoulders, blonde_hair, blue_eyes, blue_one-piece_swimsuit, breasts, collarbone, hydrokinesis, kofune_ushio, long_hair, looking_at_viewer, nanazuki_(ocococococ140), one-piece_swimsuit, open_mouth, outstretched_arm, rainbow, reaching, reaching_towards_viewer, solo, summertime_render, swimsuit, very_long_hair, water, waves