Kay so I'm reading the novel and I still don't know how old he is and i don't remember if it ever said that on ch 1 when he created the company or how many months have passed since Latest chapter I'm so confused is he already graduated or still in high school or university?? I don't really read a chapter properly so IDK if it ever said this
I think he`s on university, from what i can remember from last chapters. As for age ... probably around 22-25 ? only a guess tho
I remember until now he held 3 new year parties, to send that guy on 3 paid vacations, so i would assume around 3.