SEX is an endearment of the Kyuukyoku for a human being. Among SEX of the So, anyone thinks; "do not want to be separated from a beloved person"…Want to be connected all the time…deha, till when can the person be really connected? Three men and women challenge the limit of the human Sei in order to give an answer in a question of the So! 'ji where so re merely continues one' ma ○ koni chi ○ po as for the rule! ！Who is it as expected to have stayed till the last? ? This is form of the Ai which the human watches for the first time! ！
