Shouwaru Tensai Osananajimi to no Shoubu ni Makete Hatsutaiken wo Zenbu Ubawareru Hanashi  

性悪天才幼馴染との勝負に負けて初体験を全部奪われる話, A Story About Losing All My First Experiences After Suffering Defeat At The Hands Of My Twisted Genius Of A Childhood Friend

In essence, Yoshizawa Wakaba's childhood acquaintance Umezono Komaki presents herself as a competent and well-mannered student, but beneath her facade lies a spiteful nature towards others. To retrieve her lost respect from Komaki, Wakaba proposes a competition. However, Komaki warns her that every time she defeats her in the game, she will take away one of Wakaba's cherished possessions. Despite her animosity towards Komaki, Wakaba's true emotions become more apparent with each loss in their competition.