Season 1 DXD (Goes from the first season to season four Hero)

Seasons 2, 3, and 4 will take place in the world of Neptunia.

Season 2 - (Neptunia Rebirth 2)

Season 3 - (Neptunia Rebirth 3)

Season 4 - (Mega Dimension Neptunia)

The Final Season will take place In the world of Date A Live
Season 5 - Date A Live (From Season 1 to season 3)