Last night, Hiroshi paid a visit to his girlfriend's house where he met her kind and beautiful mother. He couldn't help but feel inappropriate feelings towards her. That evening, after being graciously allowed to stay by Mrs. Girlfriend, Hiroshi found himself aroused during their intimate bath time exchange. Unable to control his desires any longer, he sneaked into Mrs. Girlfriend's bedroom late at night and attempted to engage in forbidden sexual activities. Just as he was about to penetrate her, they were interrupted at the last moment...

彼女の家へとお邪魔したヒロシはそこでご挨拶した優しくて美人な「彼女のお母様」に内心不謹慎な感情を抱くのを禁じ得ないでいた。その晩、お母様のご厚意で泊めていただく事になったヒロシは、お風呂場でのお母様とのむず痒いやりとりに思わず勃起してしまう。そして寝静まった深夜にヒロシは辛抱堪らずお母様の寝室へと忍び込んで禁断の夜●い行為を仕掛けてしまう。その晩はあと少しで挿入と言うところで間一髪免れたのだが…！