Take her out!

Natsu wasn't overly worried about this considering the stipulation that she would be submissive to him in her 'transformed' states... Buuuut she was technically still Erza. If he didn't take her somewhere she wanted then this 'date' could turn into them both reluctantly staring at one another from across a table.

He needed something nice...

It was getting to be later in the evening, and Natsu had an idea. But first he needed to stop off at 'home'

He quickly rushed inside, getting changed into a nice suit, then taking Erza out to what was basically the singular fancy restaurant he knew. As they approached, he saw her eyes light up

"Bingo" he though to himself.

They entered, seeing a crowd of people... He should have made a reservation.

"Or... Not bingo."

Erza began looking around, taking in the atmosphere

"How did you know I was a regular here?" She giggled. Catching Natsu a bit off guard. This posh, doting girlfriend thing was new to him - especially from her.

"Ah! Miss Scarlet!" A voice called out, as a waiter approached. "Your usual table, I imagine?"

Erza smiled

"Of course."

Natsu breathed a sigh of relief as they were escorted to a lovely outdoor table with a view over a garden, both sitting down across from each other.

He really lucked out...