DWARFSOFT-Dekapai♥Namaiki♥Imouto Maou♥ ~Dekachin♂Gachi Iki Toubatsuki~ Final. (jap)

My big-boobed, cheeky little sister, who always makes fun of me and calls me "Zaaako, zaaako, zaaako onii-san," has become the Demon Lord in another world, so here comes an ADV where I become the hero and punish her sexually!