The Call

Nene one day unexpectedly got a call from someone who claimed to be from the future .

The future seems to be paralleled with the past because any slight changes that Nene made, heavily effects the future.

With the ability that Nene has, she has now been given a task by the unknown caller to help Hanagaki Takemichi in his mission on saving his girlfriend, Tachibana Hina

In return, the caller would tell Nene every unfortunate event that would happen to her in 12 years and the fate that awaits her.

What is the unknown caller real identity? Would Nene be able to carry on the task that was given to her?