Ono Matori is an undercover prosperous erotic manga writer and a high school student. He stumbled upon his neighbors and classmates, the Hikasayama twins, Haruna and Wakana, who have become his latest source of inspiration. While the spirited and dynamic half, Haruna, and the calm and poised half, Wakana, both become smitten with Matori, he unknowingly accepts to date them both for their research purposes and his natural curiosity. This romantic entanglement will provide Matori with valuable material for his erotic manga plots, but how will his personal life be affected?
