Natsu and Asuka is an omake of Fairy Tail by Hiro Mashima. Natsu and Lucy take care of Asuka while her parents are away. After playing around for a bit, Asuka decides she wants to do some jobs. The two Mages take the girl on several easy jobs, enabling Asuka to buy back a memento of her parents that they had to trade away during hard times. When thieves steal this memento, Natsu takes them down and makes Asuka think she did it.