INFINITE WAS DEBUT IN 9th June 2010 with their hit debut song, "Come Back Again"

Come back again, come back, come back,
Come back again, come back, come back,
Come back again, come back, come back,
Come back~ (come back~)

You’re the only one I have, no one can take your place.
no matter how hard I try. This won’t do, it just won’t do.
You’re the one who knows me.
I can’t do anything without you.

Then We have Apink, Like A Dream. The song was in their Snow Pink Album (22nd November 2011)

(I already know) You’re not going to comeback

(Even though I know) But I’ll still wait for you

Like a dream I have met you, like a dream we loved

Our love was as happy as a dream

Like a dream you have appeared, like a dream you have left

Comeback to me again, since I’ll be waiting here for you

So as what i see apink is seemed to answering infinite's song, when the guy thought that the girl has left and wont return and want her back because they cant live without her.

While apink thought that the boy has left and wont return, but the girls kept waiting till the boy came back.

So the boy begging for the girls to comeback while the girl is waiting for the guy to comeback.

Quite simmilar isnt it?