[KUNK-051] Vận động viên thay thế môn điền kinh, Mikoto 19 tuổi, trải qua huấn luyện khắc ngệt với câu lạc bộ sở thích quần lót đã qua sử dụng của người mới tập.
Mikoto-chan, a first-year university student, discovered at a certain track and field competition. Mikoto-chan is a reserve. Although not a regular, she works hard and is cute, so I cheer for her. Over time, as I went to cheer her on at each competition, we became familiar with each other. And by giving her new shoes and training wear, I was able to win over Mikoto-chan. Today, I will practice with such Mikoto-chan at a hotel. I wonder if I can get her to show me her naughty underwear after sweating a lot...
