Idea for sequel: the black-haired girl is sad because Tomoya ended up with someone else, so the another boy accompanied her to help her forget her sadness. And you know what kind of accompany I'm talking about.
Behold! ... The Most High Supreme Lord Of Vanilla has effectively Laid The Smack-Down on our collective candy-asses ... AND IT WAS GLORIOUS!
Tomoya: "I didn't expect some sort of Osananajimi Inquisition!"
Ouse (bursting onto the scene to jarring musical chord): "No-One Expects The Osananajimi Inquisition!"
But Seriously Though, Ouse's been *a-hem* "trained" in the requisite skills by her mother (opinions may vary as to whether certain *a-hem, again* "skills" were instinctual or imparted via a certain class of magazines), PLUS she effectively has the Approval of Tomoya's mother, who's seeking to protect her stupid virgin son from some gold-digger (bwahahahahahaha!).
You Have No Way of Escape, save "six feet of earth", Tomoya-kun; plus it seems Page 18 confirmed you also managed to raise the Osananajimi Romance flag.
In The End, There Can Be Only One Conclusion, and That's The Bottom Line 'Cause MHM Sez So ..... APPROVED!
Ah, Homunculus Vanilla, always a pleasure to see.
Also, he called his mum an old hag, but if you ask me, she was being the best possible wingman mom that she could be! Sending him the perfect wife candidate straight to his door...In a maid outfit! What a great mother.
Minus points for needing her to prompt him to say the words, but he earns them right back by saying it straight and giving us some sweet Vanilla loving.
Great ending though. Considering the maid outfit earlier, I can see why she went with the master angle, though I think it'd have floored his friends more if she claimed to be his wife.