That is exactly it, though. As they say, you are your own worst critic.

[He'll see it every day, knowing it doesn't perfectly match!! It is truly a travesty, Rin.

He takes them and gives her a little bow. It's overly formal for something so simple as her having found some brushes for him, but hey.]

Appreciated, Rin. [...and now since his curiosity is getting the better of him:] Are you planning some decorating of your own?

[He means the painting that Rin was moving.]