30-sai no Hoken Taiiku

Also known as:  A Thirty-Year Old's Health and Physical Education, Health and Physical Education for 30-Year-Olds, Sanjuu Sai no Hoken Taiiku

The TV anime series 30-sai no Hoken Taiiku is created by Gathering (Tono to Issho), based on Mitsuba and Ichijinsha's guidebook whose title translates to Health and Physical Education for 30-Year-Olds. The book is aimed at men in their 30s who have not experienced romance or sex with women yet. The protagonist Hayao Imagawa, a 30 year old salaryman, is visited by Daigorou, a god sent from heaven to help him get rid of his virginity.

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Producers, official website and other details: AniDB, ANN, Wiki