Kuro Ai: Hitoyozumakan Inkou Rannyuuroku – Ep.1

Tetsuya comes to visit her aunt in order to ask for money for the operation for her girlfriend. But before helping her nephew, a very young aunt advises her not to borrow money, but to earn money. It will be necessary to work as a coach, a fucking coach.
With Tetsuya, the girls gain experience and become professionals.