the author actually revealed it on twt that Milo should have been much older. they changed some of the character setp and style and the beta version also looks good. Beta ver MC have similar build with Uncle A but Nachioboy changed it and made him slightly slimmer than Uncle A. So Yeah. Milo is an adult and some of their arts on twt have milo as an adult (aside from the mem they drew abt milo, child ver, who looks so shock and in dismay)
It was the other way around; the bonus content here was drawn before the Mahnwa and M2 was originally supposed to be an adult but the artist later on decided to make him a child instead. You can actually find a drawing of adult Milo on their twitter that they posted last year
well, it would be much worse if they wouldn't aged him up for this one
I love this manhwa but why tf they have to age up the son on this one?