I don't know much about this Japanese developed game available for the Nintendo DS, other that it might win the award for the longest video game title ever... and it has some very nice butt shot animations in game.
Saya is one of the bosses encountered by the party in the game. As one of her attack animations, she flashes her tight jean buns before blowing a smooch to her rivals.
Kaguya Nanbu is one of the main heroines of the game. Here she is in some promotional material flashing her panties and some side boob action.