My wife is about to give birth! My sister-in-law and I came to help with the housework.

Her husband, Hideki, just married her childhood friend Risa. They had planned to have a baby after a while, but Risa got pregnant soon after they got married. Hideki's plan falls apart. Since Risa became pregnant, she has completely lost her sexual desire, and sex with her husband is completely prohibited. Hideki's ball bag is on the verge of exploding! I had no choice but to live a lonely life, masturbating with AV as a side dish. One day, my sister-in-law, Rin-nee, came to help with the housework...