We lost a MC, we got a child and saw how he has been growing up. I feel like both stories should have been going forward together, but somehow the MC, as you said, got stuck somehow.
However, this last chapter as a final season chapter was wholesome. I hate when they close a season with a cliffhanger, or unreadiness. Thanks for that artist + author.
Nonetheless, leaving the MC in favor of the second character seems like managing two good stories in one webtoon. Good job buut we expect news from both !! :D

Its all very cute, love seing the lil prince courage grow. but i feel like we kinda lost the plot-.. What made this interesting aka the mc being an ex assassin and getting killed/betrayed by her boss was totally forgotten... Now this feels like a child-care story when i read it expecting some kind of action/revenge