These short updates are getting annoying. There is only about 20 minutes of content here. Inceton really need to put out worthwhile updates. Compare this to something like Summer with Mia and this is a clear downgrade in quality.
I'm sorry you feel that way. The update is actually one of the largest released in some time, 1600 renders total. For context, this is longer than the entirety of ep1 back when releases were made over a longer development cycle. It is possible the brevity you experienced is down to decisions you made during your playthroughs, assuming you have only played through the update one way. One of the key philosophies of my writing style when it comes to writing and creating the story of Lust Bound has been making a choice driven AVN that lets your playthroughs feel unique and gives consequence to your actions, to help set it apart from games like Lust Theory with its time loops and more closed narrative structure.
Without wishing to spoil any part of the update, the scenes can all be played in different ways, having different outcomes and results depending on your choices in the scene and decisions made in the past. It is possible the brevity you experienced might have come with your choices leading to the shortest routes. And, of course, branching conversations and paths mean that even though you experience say 100 renders of content in a conversation, there might be 100 more you haven't seen accounting for different paths, stats etc.
None of this is meant to discredit or dismiss your experience, it is rather an attempt to consider why the update might have felt short to you despite being one of the longest made in sometime. I am geunienly sorry you felt the update was too brief. It's disappointing to hear and I will keep your feedback in mind, as I continue writing and developing the story, so thank you for sharing.