So, what can you unlock for the new boss? There are three outcomes from what I see:
1) Win the first battle, then when you lose the second a cutscene triggers and the boss goes away. This seems to be the end of the current patch.
2) Lose the first battle and get shoved inside the nipples. Then the only option seems to be dying, with even the surrender option not working (you need to hit 0 HP).
3) You try to run away, and she smashes the tower with her tits.
None of the above unlock anything in the gallery*. Did I miss something, or is the above to be 'implemented later'?
PS: The extra entrance in the sewers is still WIP, anyone have any idea when/if it will be implemented? Or another battle with the green-haired auntie, for that matter?
EDIT: Unrelated to the above, the Fallen Angel random encounter turns your dead guys into souls. Is there any follow-up on that, as a secondary enemy doing something with them?
The first one for now is the end of the boss fight. Boss is not fully complete (there is one battle phase unimplemented), but based on the final message, you win.
the last two will be added once you win the fight, you can find it in her event gallery, in right down corner (ground is colored dark blue).
Sewers and the aunt for now have no new info when it is going to be updated more, though I assume the aunt is completed (hopefully not because all those options are good).
The EDIT, sorry I have no idea, I don't even meet that enemy.
And about the inside nipple event, well you don't have to deliberately lose to get shoved. There are some other ways to get shoved fyi... and you can also get out of there (though in the gallery you won't).
Also another funny thing is... normally you would not take damage when you are inside her boobs in the official battle... but in version 0.563, she will damage you in there (and of course you can die in there faster) lol.