If your childhood favorite cartoon was Speed Racer, consider this one Pulse Racer. Appealing to the adolescent at heart, this continuing soap opera focuses on Ataru who, in Vol. 3, visits his friend Akira, whose sexy stepmother plays tennis without underwear and later seduces him in two hot hardcore scenes.
In Vol. 4, Ataru's parents leave him in the care of a slightly older baby-sitter. She does the laundry in skimpy underwear, getting her top wet, much to the kid's delight. He rifles through her panty drawer while she's away, but is caught sporting an embarrassing erection later on. A sub-plot with adults provides all of the hard-core animation, which is explicit as live-action features, and often a damn sight more erotic.