colorful palette, akiyama mizuki, project sekai, game cg, highres, official art, third-party source, 1other, 3boys, 4girls, backlighting, black ribbon, blurry, blurry background, bokutachi no seizon tousou (project sekai), brown hair, long sleeves, looking at viewer, medium hair, multiple boys, multiple girls, parted lips, pink eyes, pink hair, ponytail, ribbon, shirt, sidelocks, solo focus, tongue, tree, white shirt