A male high school student on a school trip and a married woman on a hot spring trip meet at a mixed bathing hot spring! At first the married woman was nervous, but her guard gradually dropped, revealing her mature body! The young male high school student's cock is fully erect, unlike that of his classmates! And the married woman who saw this also becomes horny, feeling guilty for having made him erect! Even though she knows it's wrong, her reason collapses at the sight of the many young, erect cocks! She reaches out to the cock herself and bites it!