https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_500809

Part 1 (Chinese): https://e-hentai.org/g/2055745/cbdc8bb5a3/

[Synopsis]

Our heroine, Akira, has been focusing on track and field but has fallen into a slump.
She receives ''special training'' from her advisor, Gondawara Tsuyoshi, who has competed in world championships and succeeds in improving her grades.
This time, she will be participating in a 3-night, 4-day intensive training camp in order to pass the national championships!
Her advisor, Gondawara, orders her to participate in practice with a vibrator inside her and Akira struggles to endure the frustrating stimulation.
After practice, she can't stand it anymore and asks Gondawara for ''special training'' and he tells her to come to his room at night...?
Sphincter training with a vibrator! A blowjob service hidden from the club members! Endurance sex until morning!
Gondawara's ''special training'' becomes more intense in response to Akira's desperate efforts to keep up .

Base +25, Fofotron +25, alexespiga +6, nuts987 +13, kemono69 +15

4年后更新了

Base +6