Seigo and Miki, who have been married for two years, were trying to conceive by abstaining for a month and releasing the stored sperm, which coincides with the fertile period just before ovulation. Miki's older sister Mina, who lives in her neighborhood, also wanted to have a child with Miki, but due to her husband's ED and her busy schedule, they have not had sex... Mina, who wants to get pregnant before her sister, comes to Seigo on the day when her sister and her husband are due to have a baby, wearing no bra that makes her nipples stand out. I was going to steal it...