金剛八重垣流の繁栄が、じいちゃ――
祖父母にできる唯一の恩返しです

1girl, solo, yaeno muteki \(umamusume\), horse girl, horse tail, japanese clothes, sleeveless, detached sleeves, fingerless gloves, red gloves, cleavage cutout, clothing cutout, sash, obi, hakama, ribbon trim, black skirt, kneehighs, socks, sandals,