2boys, 2girls, anniversary, black hair, braid, braided ponytail, dark-skinned female, dark skin, debris, grass, grey hair, heterochromia, jewelry, mechanical arms, mechanical parts, mechanical tail, multiple boys, multiple girls, orange eyes, ponytail, railgun, red eyes, science fiction, short hair, single mechanical arm, smoke, tail, trench coat, white hair, wreckage, yellow eyes