Ken should gtfo of that family. He needs to cut the family off and live his own happy life. Prob the ONLY sane one
I don't think he's found his threshold yet, unfortunately.
Now that
Goto, the Super Impassive/Spineless Father, is putting his foot down...maybe Ken will have a moment of clarity in realizing how untenable this situation is. But his PI lady friend seems invested still, even beyond Ken himself--and if she's remaining involved, I don't think Ken can break away.
Hopefully he does come out of this alive at the other end though, yeah.
Definitely enjoying watching the dynamic of this family unravel, though. I do think Akemi is just in a "wants her cake and to fuck it too" sort of state of mind, given how she accused Goto of infidelity so shamelessly. But the spiral of the two of them and Moe and her half-brother is riveting.