
the author said that they were in a heavy state of depression which is why they dropped it for four months, but they updated saying that their health is better now and that they're ready to continue to work on this manhua!
source: https://twitter.com/xSo8718bKdxtpQK/status/1295315330663759875

sage’s probably around 16-18 and is even depicted as older in the novel this was based off of. hell, here’s an official novel illustration: https://rb.gy/o5we9o
plus, it wouldn’t make sense for him to be under the age of 16 either. (also, remember hisoku was *10* when sage went to go live with the blue king)
prime examples being the flashback scenes:
- http://www.mangago.zone/read-manga/5_nin_no_ou/uu/63bfcf9800f73f17306947bd7baef831_chapter-10/pg-6/
(he’s able to differentiate poisonous berries from edible ones)
- http://www.mangago.zone/read-manga/5_nin_no_ou/uu/63bfcf9800f73f17306947bd7baef831_chapter-10/pg-7/
(he looks considerably more than two years older than her. key indication being the way he’s holding a newborn-few month old hisoku)
- http://www.mangago.zone/read-manga/5_nin_no_ou/uu/63bfcf9800f73f17306947bd7baef831_chapter-10/pg-8/
(sage’s working + hisoku looks at least 2-3 and sage still looks more than two years older. like around age 10-11)
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it’s unclear how old the blue king is though. but based on this manga and the novel, he’s most likely to be in his early-to-borderline mid 20s?
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the reason sage looks the way he does, is probably because of that popular trend in japan where mangakas draw grown characters to look as if they're children (if you get what i'm referring to), which is a shame because he looked great in the novel illustrations.
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tl;dr, sage is not 12.
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edit: apparently sage thinks he's around 13-15, but he doesn't know his actual age. he's most likely older than he thinks he is.

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seungho was malfunctioning for a hot minute during the sex scene lmaoooo. it was like he didn't know what he wanted, and kept saying contradictory things like:
"no more of your meek 'yes, i like it's'"
&
"your whorish behavior? yes i approve."
&
"what's made you submissive all of a sudden?"
i felt bad for laughing at that. i've never seen this guy stumble on his words before.

y'all, it's uncharacteristic for seungho to suddenly say sweet nothings to nakyum just because he's feeling down. seungho doesn't exactly know how nakyum is feeling, sure maybe he has some sort of idea, but since he has a playful way of speaking, i don't think it'd be natural for him to all of a sudden say, "here, have my food because i care about your wellbeing."
usually nakyum would take the joke, but since he's already been called a prostitute by the person who he respected most, he took seungho's words a little more seriously. it was like seungho was rubbing salt on the wound.
the way he grabs jihwa's wrists and pulls jihwa's hand away from his mouth when he notices jihwa biting his nails.
i can't-
that's lowk cute-
( http://www.mangago.zone/read-manga/yahwacheop/uu/iur_chapter-50/pg-25/
http://www.mangago.zone/read-manga/yahwacheop/uu/iur_chapter-50/pg-26/)