bit of a rough changelog from what I saw
New H-content
1 animation with chain thug and runt
Other changes
Femcop now appears as a enemy hardest mob compared to the others
Also 3 Femcops appear as the wave 30 enemy instead of the normal bosses
New hub area / map
Instead of picking a area on the new game you can now go to a world map with same level select options + a hub area which is pretty much the shop area in game.
You can leave the missions and keep the lvls and equipment you gain in the missions but only for that session if you quit the game it doesn't save data.
you can get the pickup same as the other gallery item for the new entry but might have a low drop rate or I have bad luck as I got to round 51 before it dropped