Shin'yuu to Gouri Teki ni Yaru Houhou親友と合理的にヤる方法; Shinyuu to Gouriteki ni Yaru Houhou; วิธีหลอกล่อเพื่อนซี้ให้มีใจ; 친구와 합리적으로 하는 방법; How to Convince Your Best Friend to Sleep With You

"Do you wanna make some money off gay videos together?" "Huuuh!?" With a purpose in mind, Chidori Igarashi makes a proposition to his best friend, Kyousuke Amarai. Although he'd never expected him to accept filming erotic videos even if the money is good, Kyousuke took up the offer with the condition that they split the earnings 60% to 40%. "Wait, will I really get to do naughty stuff with Kyousuke?" Chidori only had a brief moment to feel excited about his long-awaited success before the act started to escalate...!! A secret relationship develops from the premise of "filming erotic videos to earn money"...