I have a 问题 regarding the 秒 season.

I am thinking about buying the 秒 season on DVD, but the only problem is that it is rated MA. I am not a big 粉丝 of MA rating type shows, but if it's something mild and less disturbing, I can watch them. The only thing I need help on is what content does the 秒 season have? Is there any hard core violence? Sexual content? Etc? What stuff is in this season to make it an MA rating? I am just looking for 答案 and opinions because I might consider to buy this DVD set once when I go after birthday shopping (my birthday is 下一个 Saturday).