Source:
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_748310

Artist:
https://www.pixiv.net/en/users/100049885
https://x.com/echigooriman

Comment:
I misspelled the artist's name in the title, so I urge anyone who likes his style and wants to increase his discoverability to bump the petitions to rename my previous galleries to change Echigiriman to Echigooriman, which is what he goes by on pixiv and Twitter. He also had a chapter published in a magazine with that name. Bump the artist tag, too. Thank you.

Other Works:
https://e-hentai.org/g/3666891/33dbe9db6b/
https://e-hentai.org/g/3666890/58ed4cc1c1/
https://e-hentai.org/g/3383458/f497ebd6fe/
https://e-hentai.org/g/3439025/0810457f94/ [English]
https://e-hentai.org/g/3769374/acd050d081/

Synopsis:
This is a fictional story set in Japan.
In Japan, more than half of the men in the country are virgins.
To break this deadlock, the government has introduced the "SEX Personal Trainer System."
This is a system designed to improve the physical health of virgin men and give them experience in sexual intercourse.
To put it simply, the scheme is: "If you get muscle training from a beautiful female trainer and become ripped to a certain level, you'll get to have sex with the beautiful female trainer!"
Shinsuke Yamada took on the challenge of playing the main character, the fishing rod.
Yamada, who was a virgin until the age of 20, was eligible to participate in this program and decided to take on the challenge without hesitation.
In order to have sex with my idolized trainer, Shiori Aizawa, I spent a year undergoing her physical training program and successfully became ripped.
And then came the final day of physical conditioning training.
This training ending means, Yamada has finally got his chance to lose his virginity with the beautiful trainer, Shiori.
The story begins with Yamada-kun losing his virginity to Shiori-san.