2girls, a_chika-tastic_summer, arm_around_waist, bad_pixiv_id, costume, heart, heart_hands, heart_hands_duo, in-franchise_crossover, kousaka_honoka, looking_at_viewer, love_live!, love_live!_school_idol_festival_all_stars, love_live!_school_idol_project, love_live!_sunshine!!, multiple_girls, official_alternate_costume, orange_hair, partially_submerged, sky, star_(sky), starry_sky, sunset, takami_chika, trait_connection, visor_cap, wading, yanase_eiwa