Chinatsu and the girls are coming over to Himawari's house to study and hang out. As they study, Chinatsu unknowingly felt something so odd when her feet touch with Himawari's and realize they were staring at each other. What is this feeling that Chinatsu felt towards Himawari that makes her so excited and aroused? One-shot commission is made on behalf of Emperor_Niro through Pixiv.