User blog comment:NightHawk316/To Love-Ru Darkness Ova Episode 3/@comment-46.7.246.188-20130824134558/@comment-7948498-20130829044031

The first anime is more nonsensical and takes a lot of liberties in the story. You can watch the episodes where new characters are introduced, and then just ignore the rest. But starting with the OVA, it starta getting closer to the manga.

If you already watched the first anime series, you should watch the OVA, and then Motto To Love Ru. And then you can proceed with To Love Ru Darkness.