Will there be another season?

It's doubtful. The original anime series was produced back in 2014, a sequel series was produced in 2015. Sometimes there is a prolonged hiatus like there was with anime like You're Under Arrest. But, a great source for finding out this kind of information is Anime News Network. But, from little I know, there hasn't been any movement on a new series. Typically, most anime shows generally last a season or two.