The part:
link
At the end of the story, Eclair died.
Eclair: Thank you,Natsu.
Eclair: Lucy is very sad now. I leave her to you…
Momon: We have to go now. Thank you! Everyone in Fairy Tail!
——
Lucy: Natsu…
Lucy: Is magic good? या malice?
Lucy: No matter what it is…
Lucy: I just want a magic…to stop my tears now…
Natsu: Eclair… smiled at the end.
Lucy: Natsu……
Natsu: Don’t worry.
Natsu: We’ll stay द्वारा your side.
(END)
link
At the end of the story, Eclair died.
Eclair: Thank you,Natsu.
Eclair: Lucy is very sad now. I leave her to you…
Momon: We have to go now. Thank you! Everyone in Fairy Tail!
——
Lucy: Natsu…
Lucy: Is magic good? या malice?
Lucy: No matter what it is…
Lucy: I just want a magic…to stop my tears now…
Natsu: Eclair… smiled at the end.
Lucy: Natsu……
Natsu: Don’t worry.
Natsu: We’ll stay द्वारा your side.
(END)
Why NaLu will happen:
Natsu & Lucy represent Haru and Elie who are a couple from Hiro Mashima's पूर्व manga, Rave. With that दिया and the OVA when Elie कहा to Lucy that Haru & Natsu are their hero's then that is Hiro saying that it will happen.
Another reason is that if आप check Hiro's pics on twitter, आप can see Natsu & Lucy coming up a couple of times.
The last reason is that on a Fairy Tail side story (only manga) there was a time when Juvia is hallucinating and sees Natsu & Lucy doing romantic stuff.