Is this a sequel to the first? or i can play this straight away?

[Ryoga]

Never played the first game

[Holy Avatar]

I forgot the story about the first game, So I dont think you need to play the first, hehe. But the first is also good and different enough to play it too. xD

[Yu Lanter]

this game has a short retelling of the first. but I would recommend starting with the first one. since this game is a direct sequel.

[Obrigador]

So it's necessary to know the plot of the first one? Because I thought it's not a sequel...

[Marmorkatze]

Originally posted by Obrigador:

So it's necessary to know the plot of the first one? Because I thought it's not a sequel...

It's both.
The main game is a prequel, but there are scenes set after the events from the first game. Especially near the end. It's highly recommended to play Tormented Fathers first, as many events from the first game will be spoilered.

[Stigma]

Necrobump..
No, you won't understand the story at all if you haven't played part 1. This acts like both a prequel as well as a sequel, and as such you have to be familiar with part 1.