Sejin's family is toxic trash, I get why Ido wanted to separate him from them, but at the same time not reestablishing a support network that's healthy for him outside of that is an oversight by Ido.
I mean sure. And Sejin understands it. He immediately rewired his brain to maintain stability, I guess. But Ido effed up, again.
ML's can be thick sometimes. I suppose setting up the company for Sejin and getting him into perfumery might have been a clumsy attempt at sort of redirecting Sejin's aimlessness and precarious professional situation and Ido thinking that it's enough of a new life aim/fulfilment for Sejin, but it doesn't really 'fix' anything particularly when Sejin gets mixed messages and starts falling for him. Again, dumb bros be dumb sometimes.
Lool. Yeah. He's dumb. I can imagine this could have been fixed if he just talked more, even without mentioning anything about the past and built up more lies, as long as Ido fixed Sejin's actual issue - sense of belongingness, rather the lack thereof. But then we wouldn't have the drama we're all so enamored of.
Seme: I won't make the same mistakes. I will keep him alive. Give him his freedom. His choice.
Also him: Hurts him. Isolate him. Potentially drive him to unalive himself again.
Great that Sejin is stepping up. I just hope that if he does find out the truth, he can handle it.