@Tf_ later in the manga, yu allows ken to let out his desires. in some moments he shows obvious fear, cant remember which chapter its in but youll see it later in the manga
straight up jorking it.. and by it, heh. i mean my peanits i need boypussy RIGHT NOW
"when we split up.. He looked strange and it scared me.. So I was little worried about seeing him... But he's the same old Takamada"
How ever if it was trauma I don't think he would go find Taka when he is "worried about seeing him".
And if he was actually scared of what Taka might do he wouldn't have let him do whatever. Like there's no point where Yu is concerned for himself. If anything I think ep 151-153 show how much Yu actually trusts Taka despite the things he did at the beginning.
Who is traumatized there is Takamada himself, he doesn't trust himself. What's good tho is that he expresses those concerns to Yu and despite that Yu trusts him. (again don't see Yu as the traumatized one)
