While I do love any and all magical shenanigans: EX The rabbit transformation scene featured above.
The scene where you buy out Mirina's contract and find her in the field of flowers is what got me from Version 0.10c to a full fledged purchase.

I would say every moment of the game was enjoyable but some of them were much better like when we fought with arachne the black form was demmm and when we fought the three headed dragon killing him was a challenge. Aside from these, both scenes of maiden were soo good!!! And ofcourse that one scene of elf where her eyes became heart!!

When the Witch fuses with us. I love that design

The arms dealer scene after we return to her exhausted and broken.

Absolutely peak, especially after we pull out of her ass and her eyes go all lovey.

When getting up to quest #37 in V0.82 and they found out I have to start the game over. (because past saves don't work) I have yet to start over / have never made it to the ending. :( 
Glad not all adult novels treat its supports like this creator does. 

the boss fight against Arachne. The first one, to be more precise. It was not only very fun, but the dungeon before, the build up... it was pretty nice !