fuugetsu, fuugetsu (fuugetsuen), morichika rinnosuke, yakumo yukari, original, touhou, black footwear, black legwear, translated, 1boy, 1girl, age difference, ahoge, belt collar, blonde hair, book, boots, bow, brother and sister, child, collar, dress, frilled dress, frills, gap (touhou), grey hair, hair bow, hat, hat bow, height difference, if they mated, lace-up boots, long hair, long sleeves, medium hair, neck ribbon, obi, puffy sleeves, purple dress, purple eyes, red bow, red ribbon, ribbon, sash, shadow, shoes, siblings, sleeves past wrists, socks, white background, white hat, yellow eyes, yin yang