Marina Yuzuki, the owner of a one-day big-breasted talent J-Cup, comes to a father and son's family as a documentary program. The purpose of the program was to put a temporary mother into a family who is hungry for a mother in a father and son's family and plan to interact with it, but the men are lustful for the role of mother and attack one after another. I accidentally shoot the situation ... What will happen to Marina-chan, who is only a male family member?