[松竜太] 魔王を討伐した勇者の次の仕事は子孫繁栄です

Hero got 4 wives and a slave. A 12, 13, 14, and 19 yrs. old wives and a 10 yrs. old slave. All of them needs to be impregnated as per se. Since the demon lord is dead so the king ordered him to have many children.