The first volume of the original series for men in their 30s was released in November 2008, and the five-volume series became a best-seller in Japan, printing over 500,000 copies in total.
In 2011, it even got its 12-episode TV anime adaptation animated by Gathering (The [email protected] Cinderella Girls Theater).
Japanese publisher Ichijinsha will release 40-sai no Hoken Taiiku (Health and Physical Education for Over Forty) on June 13, which is a sequel to the educational guidebook series for men who have not had any romantic relationships with women.