How do I keep watching Darker Than Black?

Ta
4

First of all, thank you in advance.

I've now finished watching the first season (25 episodes) on Netflix and then the additional episode, which is just a bonus and takes place somewhere in the middle of the season. However, I don't know how to look further now, because somehow there's no real connection between the first and the second season. Now the question is whether I have to watch the OVAs to keep up with them, but actually OVAs have no relation to the storyline, they are just "side productions". Or not?

Ta

Thank-you!

Ce

Darker than Black: Kuro no Keiyakusha Gaiden

shows what was between the first and second season

Ta

Thank you.