"To love ova" likely refers to "To LOVE-Ru" (pronounced "To Love-Ru"), a popular Japanese manga and anime series. The "ova" part refers to OVAs (Original Video Animations) — anime episodes released directly to video/DVD/Blu-ray rather than broadcast on TV.

Here's what you should know:

To LOVE-Ru OVAs

The To LOVE-Ru franchise has several OVA releases:

1. To LOVE-Ru OVA (2009–2010) — 6 episodes bundled with manga volumes, adapting various ecchi/comedy side stories.
2. To LOVE-Ru Darkness OVA (2012–2015) — 6 episodes bundled with Darkness manga volumes.
3. To LOVE-Ru Darkness 2nd OVA (2015–2017) — Additional OVAs bundled with later manga volumes.

Content note

The series is a sci-fi harem romantic comedy known for heavy ecchi (suggestive) content, especially the Darkness entries. The OVAs tend to be even more fanservice-heavy than the TV seasons.

Watch order (roughly)

1. To LOVE-Ru (TV, 2008)
2. To LOVE-Ru OVA (2009–2010)
3. Motto To LOVE-Ru (TV, 2010)
4. To LOVE-Ru Darkness (TV, 2012)
5. To LOVE-Ru Darkness OVA (2012–2015)
6. To LOVE-Ru Darkness 2nd (TV, 2015)
7. To LOVE-Ru Darkness 2nd OVA (2015–2017)

Would you like details on where to watch, a specific OVA's plot, or clarification on something else?