One day, An's family, who are friends of Hiro's mother, came to visit his house. Although they had met in the past, seeing An now with her explosive tits and voluptuous body made her look incredibly erotic to Hiro. Unable to suppress his sexual desire, Hiro began masturbating with An's underwear and taking advantage of moments when her son was away to act spoiled and grope her body. His actions continued to escalate, until finally...