Adult PC Game: Najimi no Obachan -Batsuichi Jukujo to Inran Miboujin- by Guilty+ Archive

Hajime is back to his hometown. One day, he meets Sachiko, who works at a box lunch shop. He knows her well, so they talk a lot. Soon after she knows that he is looking for a job, she introduces him a part-time job at a sport gym. He starts working there, but there are only two customers, Sachiko and Kazuyo, Sachiko's close friend. Days later, Sachiko suddenly pushes her breasts to his body at the gym.... Hajime runs away, but it is just the beginning.... Also, Kazuyo starts approaching him.... Like this, Hajime's hard core life starts....