Ch.1: Shuichiro Ebihara is appointed to teach the ropes to Kanbe, who has just been hired.
Kanbe used to work as a masseur, and seemingly joined the company because he knew the CEO from his previous job.
That's also why he offered to give a massage to Ebihara.
As Ebihara agrees to it, Kanbe takes this opportunity to give him a brainwashing massage, and he turns Ebihara into his cumdump, training his ass and nipples.

Official Translations:
English, T.Chinese

Ch.2: Shuichiro Ebihara, a single father who has been brainwashed, has now been fully trained by Kanbe, his subordinate.
However, he resists him when Kanbe tries to make a move on him at work, and to make up for that, he ends up agreeing to be used by him freely, whenever they're not working.
Like that, Kanbe made all of Shuichiro's free time his.
"I wanna have sex at your place", said Kanbe, which is why Shuichiro is now bring him home with him, so that they can fuck there.

Official Translations:
English, T.Chinese

Ch.3: Yuya Ebihara is the second son of the Ebihara family.
His father, Shuichiro, has been turned into a sex slave by the brainwashing massage of a company subordinate, Kanbe.
Yuya has also been brainwashed by Kobe into accepting the relationship between his father and Kanbe, but he knows it's unusual.
One day, Yuya comes out during a bath with Kanbe. He says that he likes a friend who is also in the same baseball team.
Kanbe says, "Bring your friend over."
Yuya brings his friend over and lets Kanbe give him a brainwashing massage.
With the massage, his friend becomes aroused by Yuya, and Yuya has his way with him.

Official Translations:
English, T.Chinese

Ch.4: Kenya did notice that something was off in his house.
But then Kanbe, a man who isn't a part of the family yet stays with them, offers to massage him.
Kenya is unable to refuse; so he complies right away and ends up receiving a brainwashing massage.

And after receiving one of Kanbe's gayificating massages, Kenya gets intimate with him...

Official Translations:
English, T.Chinese