Warning this comments includes spoilers, and is only meant t be read by nitrolith.
The last scene of update v0.3 seems really rushed and subpar... honestly it quite disappointed me especially after waiting so long for that scene and yet we didn't even see the insertion... I really hope you overwork that scene to make it alot better and longer, cutting the scene mid through was also really saddening... really please redo that scene and show the whole thing from begin till end no skips... this moment really deserves to be shown fully in every little details while the whole Erin being there is really annoying, doesn't changes it the fact that this is a absolute core scene everyone was waiting for.
And the first insertion scene with sera could also need some redoing, not seeing her face and not seeing her butt seemed quite off.
Otherwise can I honestly say, I love this series.
You made a masterpiece some stuff may be still rough but if you rework some scenes and continue to put in love and effort nothing will stop this series to become legendary.