It's hard tell a good story in 3 minutes in most cases and there's no reason for me to make another 1 animation loop repeatable sex scene, so I started to create sex events more like how hentai comics are done - with story themes and more static images. This takes longer, but I'm sure no one wants to fap to just the one missionary animation on the same character over and over.
This update is slow due to personal problems, I believe most other updates came out at around 2 - 3 months.
But there is less quantity in these later updates because it's exponentially hard to multiply quality. Making 70 events in that time frame is too hard now.
Jin and Ann don't have anything because they are low priority and aren't physically attractive to me. Jin may get a short story at some point to help advance Lin's story. That's what side characters are meant to do, support their main counterpart. Moon is kind of an exception, she's in some weird place between main character and side character because she'll have a more normal story.
I would like to add more dungeon stuff, outfits, lust events, etc. My priority right now is getting each different character into each of the training options. I think it would be a good idea to put more focus on that, and the other side stuff for an update maybe once every year or rarer depending on how things go.