5

Actually it was Banri that fainted not 2D-kun. As you can see, he's still standing on the top of the staircase. This happens in episode 7 at ~7:30-7:40


2

Koko said she loved Banri in episode seven at about 7:25


1

I would imagine it's a parody of the character, they look very similar (ignoring style differences) and share the same names (also in capitals like the manga/anime's title as mentioned in another answer) and are both punk/rock musicians. Otherwise it's a large coincidence, but I would imagine it was intentional, as Nana is a very well known series.


1

it seems like the character from Golden Time is copying NANA, because on wiki (Russian) it is said that Tada Banri read the NANA manga while hospitalized.


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