The 11th installment of the baby-making soap series! This soap is for making babies, and it's a great shop where men who want to impregnate beautiful girls who only work on dangerous days can fully ejaculate inside! This time, the guest who came to the soap girl Rena-san's place is her brother-in-law! The brother-in-law, who has been in love with Rena-san since his student days, wants to impregnate her before his brother, who has just gotten married, and repeats ejaculating inside sex!