Several years have passed since a treaty of friendship was signed between elves and humans... An elf mother and daughter, Sophilia and Lilia, live next door to the apartment. When Ueda-san eats the food prepared by his elf neighbors, he becomes restless and gets an unusually strong erection. One night, Sophilia brings him dinner as usual, however she comes back shortly after and says that she made a mistake with the amount of herbs from her homeland. They have a powerful aphrodisiac effect, and if he doesn't ejaculate immediately, it could cause permanent damage to his reproductive function. As an apology, Sophilia graciously offers to help him relieve his sexual tension.