Aritoki's scent keeps getting stronger... And, his sweaty body, red face, and deep eyes draw Yuyu in deeper... Yuyu Kusakabe is a college student who wants to go into disexuality studies. After getting approval from her professor, she tries to become the assistant to fellow college student, Aritoki Ujyou, who's always cooped up in his lab, but he keeps turning her away. After repeated tries, Yuyu finally gets into the lab, but that's when Aritoki starts to have a flare-up... Aritoki's a disexual and has been advancing his studies by doing research on himself. Yuyu knows that the fastest way to control his flare-ups is to give him bodily fluids with someone else's DNA in it, so she...!