Description: In story mode, you will play as Nico, a kind-hearted boy, using an assault rifle transformed by a succubus called Millfeuijonk. You can learn more about the world of "Guns of Succubus" while enjoying the ADV part. In shooting mode, you can enjoy high-speed "Bullet Hell" when you dodging the enemy's bullets coming from all directions. It's okay if you're not good at shooting! By setting the difficulty level, beginners and hardcore players can enjoy this game all the same! Repel the familiars that the boss summoned, shoot down the boss who have various skills!