He goes to see Lucy (And Virgo).

Natsu rolled his shoulder, which was still a bit stiff from the mission, and Erza kicking his and Grey's asses for fighting again. Still, he had recovered nicely. And of course, despite the mission not having been an official one with a client, someone on the Magic Council who actually liked Fairy Tail despite their destructive tendencies had sent them 500,000 jewels to split five ways between himself, Happy, Grey, Lucy and Erza. Someone called Sieg something, Natsu couldn't remember.

Despite the trouble and destruction they had caused, it was undeniable that they had made Fiore that much safer by defeating a Dark Guild, and removing one of Zeref's old curses from the World. So Lucy was of course happy that rent was unexpectedly covered for the whole month and then some.

Speaking of Lucy, Natsu was all too eager to pay her a visit... He still needed to test the Note on Virgo after all. So with Happy in tow, he made his way to her house once more.

...

"Breaking and entering again?" Lucy grumbled as she saw the two, but of course, due to the Note, she wasn't angry at Natsu for it, she could only direct some annoyance at Happy.

"Whaddup?" Natsu said cheekily.

"Fish?" Happy offered Lucy one from his bag.

...

Once again, the citizens of Magnolia were treated to the sight of a screaming blue streak flying through the air... Something told them this was going to happen a lot.

...

"Alright, what are you going to do now?" Lucy asked, closing the window she had kicked Happy out of as Natsu sweat dropped. Maybe he should consider not bringing Happy along next time, might save him a bit of pain.

"First, did you get a contract worked out with Virgo?" Natsu asked.

"Yeah, I just need to avoid getting in trouble with the law and have her do anything legally questionable, and then I can Summon her whenever," Lucy replied.

"Heh, a low maintenance Spirit for a high maintenance Summoner," Natsu joked.

"Hey!" she huffed as he chuckled.