Onna Doushi to ka Arienai deshou to Iiharu Onnanoko wo, Hyakunichi-kan de Tetteiteki ni Otosu Yuri no Ohanashi

A popular high school girl named Marika Sakakibara confidently claims that a relationship between girls is impossible. Fuwa Aya, a calm and attractive girl, offers her one million yen for a hundred days in exchange for Marika's attempt to believe otherwise. Despite her initial shock, Marika accepts the challenge. Each day after school, she visits Aya's home, where they engage in activities like holding hands and receiving headpats, with the possibility of more intimate interactions. The story follows whether Marika will still maintain her belief after the hundred-day period.