A super erotic work featuring beautiful busty women is complete! [The customs of a child-bearing village...] "Women become better females, and men become better males." A female mates with many males, improving her female qualities and giving birth to excellent children. To achieve this, she is educated to be a woman who attracts and pleases men, and they seek each other's excellent genes. There are sisters who run a guesthouse and continue this unusual custom from long ago. And men who have heard the rumors are visiting this guesthouse in a remote area again today...