A brand-new series that's surprisingly never been done before finally arrives! Mayu, a single and well-known female company president, agrees to babysit Kotaro, the grandson of a business associate, for three days. But Kotaro is a horny teenage brat who quickly becomes obsessed with Mayu's stunning, voluptuous body. Using his "grandson privileges," he tricks her into showering together and gropes her massive breasts. At the office, he secretly forces her into blowjob and titty fuck sessions away from the other employees. As Mayu gives in to Kotaro's escalating demands, she gradually realizes she's transformed into a fully lewd and lustful female boss.