Let's make thick sperm with a month of abstinence! Satoshi and Misato are a married couple who want to have a child. They decide to abstain from sex for a month to try a method they saw online. Satoshi is even banned from masturbating, and his sexual desire grows stronger day by day... Finally, he gets an erection so strong that it pushes up his clothes. Satoshi tries to hold off until the appointed day, but he doesn't realize that his mother-in- Mio is watching him with envy. Unbeknownst to Satoshi, his penis is in danger...