"I can't take it anymore!" One day, her son Masaru suddenly started sucking on her breasts. Even though his mother Umi gently scolded him, Masaru's rampage didn't stop. Even though he was a child, he was physically strong enough to resist Masaru, so Umi calmed him down by satisfying his desires with her mouth to protect herself... But Umi's breasts were too erotic to calm the desires of a hot-blooded young man. That night, Masaru visited Umi's bedroom...