Episode 1 - S1.E1

Hiroe becomes depressed that she cannot reach orgasm, so Mayaka tries to help her out, but to no avail. Mayake then resorts to hypnotism, which turns out to be a bit too successful as Hiroe climaxes instantly whenever Mayaka touches her. However, she is still unable to climax otherwise, so Mayaka tries some other methods, one of then turning out to be a crazy scientist. In the end though, only Mayaka's touch is able to make Hiroe climax.