Sun Tzu was fine. The first example, not so much.
It seems we'll be leaving O-Chul and Oona for a while now. Who knows what they'll be doing off-panel while we return our focus to the Order? All we know for sure is that they are destined for each other. O-Chul will have his happy ending along with Oona!
I see games of go between O-Chul and the MitD in the future. Monster-san will probably tell him about Oona, perhaps Oona will stumble upon them, or maybe O-Chul will seek her out.
Hopefully the Giant doesn't leave us waiting too long.