They work in a sex toy production company and they all have to show off the toys or some shit like that .
http://www.mangago.me/read-manga/h_jigyoubu_eigyou_ni_ka/
by Panda 4gou (Shima)1st: H Jigyoubu Eigyou Ni Ka 2nd: H Jigyoubu Eigyou Ichi Ka3rd: H Jigyoubu Kikaku Kaihatsu Hen4th: H Jigyoubu Tokubetsu Kenshuu Hen Zenpen5th: H Jigyoubu Tokubetsu Kenshuu Hen Kouhen
They work in a sex toy production company and they all have to show off the toys or some shit like that .