[Chinami Natsuno's Lesbian Debut!] A certain school's badminton club summer training camp. Chinami, who wants to get stronger quickly, was practicing earnestly. Chinami trusted her seniors, Kanna and Momo, who were enthusiastically coaching her, but she witnesses them kissing in secret during a break, leaving her shaken. The two, who had noticed they were being watched, begin to guide her in lesbian acts, tempting the inexperienced Chinami, who had never been with a woman before...