Responses
This is a guess mixed with spoilers....
Maybe Heejae's brother hid that fact that Heejae lost his memory very well.. And he schemed the accident and the next events after Heejae's memory loss incident really well.. Taekyung is a powerful person and so is the brother of Heejae..
I am not saying that Taekyung is excused by not digging into more. Just saying how manipulative Heejae's brother.
i can't believe how could taekyung do this? isn't he curious about how heejaes act? he's no longer genius. not even slightly remember him? if he can investigate everything about heejae just to revenge him, why didn't he figure out that heejae has loss memory? what a fucking stupid guy he is? he want to take over jinhwa company to make heejae lose everything but heejae doesn't own anything from the beginning. since the accident. gosh.. stop hurting and take heejae like a fool.