It does continue where the first season left of but there are some major differences.
First of so is each episode roughly twice as long, characters besides Monochrome gets more development, new characters are added and developed and some old characters gets totally changed.
The first season were more direct and quick comedy, this season offers the same style of comedy but also tries to develop their characters and give a bit of depth to it.
If you enjoyed the first season so will you probably enjoy this season as well.