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?
Thank-you!
Darker than Black: Kuro no Keiyakusha Gaiden
shows what was between the first and second season
Thank you.