Summoner: Monster Girl Harem!

In a world transformed 3,000 years ago by the sudden appearance of dungeons, a new era of wealth and power emerged. Initially welcomed as a path to prosperity, especially for the impoverished, the dungeons quickly led to the formation of the Explorer's Guild to manage these perilous locations. Those brave enough to venture inside received titles, including the specialized Dungeon Scout. Vincent Schwartz, an orphan raised by dungeon knights, prepares to follow their legacy. On his eighteenth birthday, a common age for individuals to awaken latent abilities, Vincent unlocks the rare Summoner class. This allows him to call upon powerful beings capable of devastating attacks. However, his awakening is accompanied by the unexpected emergence of "The Demonic Choice System," which presents him with random life-altering decisions and rewards. The narrative questions whether this system will lead Vincent to a life of happiness and romance, or if the world's hidden dungeon agendas will compel him into a fight for survival.