Comment by Sour Cinnamin on The Genius Who Sees Through the World - Chapter 2

@Sour Cinnamin it said he was right now 18 i think and kidnapped for 12 years so he was 6 years old i guess.

@Nuni yes but you need to know this is a Korean manga. In Korea after you're born you are 1 year old not 0

@Stardust so he 7 years old?!?!?!

@Nuni no 5, since I always imagine the Manhwa when translated still uses the Korean age. So when a Manhwa say the age of a person is 6, thtu mean 5. 
Ps: I don't know if it apply to all Korean manga but I assume so