Beloved Wife ~Frustration Relief Contract

Yuji, our protagonist, was living a happy and fulfilling marriage with his wife, Manami, until one day he developed erectile dysfunction.
Even after several years, there was no sign of his recovery, while Manami's sexual desire continued to build up.
And then, after a certain incident, Yuji became worried that Manami might cheat on him.
That's when he met Mike, who came from overseas to train at his company.
Yuji thought that he would eventually return to his own country so there would be no consequences.
Thus, Yuji offers Mike a forbidden contract...