The director just used the fan base of OMG name to gather the audience into cinema hall. There was nothing related to the OMG part one. The story of OMG2 is all together different and seems stupid.
Although the topic is good but this feels uncomfortable to watch with family. A big no to all those who are willing to go with their parents. Better spend some quality time with family at home. In a nutshell: Not recommended and time waste movie.