He said it himself in a previous chapter. He loves Dowon but doesn't want to be a burden to him.

It's a bit more serious than what the last person said. The artist drew baby x adult po**, which obviously got them fired and the story was discontinued . The author has to find a new illustrator that matches the old ones style. That is very difficult considering their financial status (as they get very little money from official websites). There's a high chance that it will never happen and thus the story won't be continued. This is what I found out when the controversy rose, but that was many months ago so some of it may be false.

If you only knew what they've done ...

Mommy says you're safe now