One day, while reading books in the school library, Daichi, a 17-year-old normal high schooler, was inexplicably drawn to an old, dusty book. As he touched it, a bright yellow light engulfed him, and he was summoned to another world called *Astralon. In Astralon, Daichi, marked on his right hand, is revealed to be the chosen hero destined to save the world from an evil god, who was sealed away by the first **Hero-King Thalos*.
To save Astralon, Daichi must win the hearts of sixteen princesses, each of whom possesses a divine weapon crucial for the battle against the evil god. However, Daichi has never dated a girl before in his life. Can he make the princesses fall in love with him and acquire the divine weapons to defeat the evil god and save Astralon?