I saw the first two seasons a year ago and when I recently got into this, I felt some nostalgia. The third season was kinda exciting. Although, the last couple episodes were a tad confusing. But besides that, the show really kept me entertained and wanting more. Shido continues to build his harem of "Alien Girls" and was a great person who continues to reach out and help those in need. Natsumi is an interesting character, her back story somewhat sad. Her powers are hilarious. All in all, you see some old faces and new faces. It's really entertaining and if you haven't seen theother two seasons, I highly encourage you see them and you'll be completely drawn to the series as a whole