Shikoyaka Naru Toki Mo Hameru Toki Mo
Part 1: A very popular orchestral happens to have a lewd switch, and when that switch is turned on there is no turning off until she's satisfied! Part 2: A tutor for a wealthy boy ends up turning him into an A student, however he has a proposition for her for some "extracurricular activities" so that she can continue her tutoring...
