Sooo....at the end do they know they're twin???

Yes. They called each other by their original names in the end.

Ah...i just realized that (￣ε(#￣)Σ thanks for the info

Namsoo actually knows from the start that hyeongho is his brother i guess cause he took the paper his father was holding and saw hyeongho's name there

Yeah ..i understand that part...but i was confused at the end (￣∇￣")

I was too HAHHAA i only realized it at the last chapter