SDJS-252 Mizutani Izumi (21), 1st Year In The Directing Department Mizutani, The On-set AD, Is Suddenly Substituted For An Actress Who Was Not Feeling Well When She Was Scheduled To Be Filmed! For The First Time In Her Life, She Takes On The Physical Challenge Of "live Nakadashi"!
원래 제목: SDJS-252 演出部 入社1年目 水谷いずみ（21） 撮影予定の女優さんが体調不良で現場ADの水谷が急遽の代役出演！？ 人生初の「生中出し」に体当たりで挑戦！
A production team was preparing for the first morning at a certain site. However, after the actress was scheduled to come in, they received a call that she was not feeling well and wanted to cancel the shoot. If they broke up the location, the cost would be wasted. Mizutani, who was a member of the film crew, was given the opportunity to play the role of a substitute. She was to appear as an understudy...and the script called for Nakadashi! Mizutani, who has never had live sex before, is troubled, but then makes a big decision...
