I really loved this series, and am sad to see that is has ended.
I find that it ended well in these last chapters, at least. There was a lot of buildup from 4 chapters ago. Nemukata wants to steal something from Yonaga, but her timidness means she just can't do it. But Yonaga tells her how despite the differences between Nemukata's school and thief personas, he liked the shining eyes that both of them have. And that's how she stole his heart.
And of course Yonaga would say cheesy stuff, he's a big fan of Phantom Thief Sleepy! Nemukata even ended up stealing Yonaga's first kiss! And I'm sure she'll keep stealing more kisses in the future!