Can you sumaryse everything you know about the game? story, gameplay, characters etc? i know it has been commented on but they are on many comments on the thread so is hard to find details.
Hard to summarize- it's a huge huge game with a ton of customization in how it's played. the Netorase/netorare filters are not the only options present at the start by any means- and those choices.. as well as ingame values you raise doing certain things will completely effect every scene. Honestly it's really ambitious- he was estimating 10 hours for a playthrough way back in the middle of last year and it's only evolved from there. Originally he wanted to release it around april which made it a competitor for Shinachiku castellas game also estimating a release window there- but I think now it's just ETA 2020.
Anyway- The games title is a bit misleading- as the priest doesn't start as a nymphomaniac or anything. And by player choice might not even become one- She is in love with the hero and wants to do everything for him- that includes- if hero enjoys being cuckolded and she's pushed with the idea enough- she will eventually slowly give into that and also allow the hero to watch for his own arousal. But this is not something she's open to at the start of the game. Just that changes everything- but the hero can also pure love with her(though he does have a much smaller dick- so that humiliation play is at work... but priest will never know if hero is the only one she sees..)- The game tries to push her into lewd environments which raise statuses- such as a slime jumping on her body which leaves an aphrodisiac effect.. the usual. Of course this can be cured- but if it's not then during battles her lust will rise and she will sometimes be unable to fight efficiently. The fighting system is also unique relative to most hrpgs but that's another story.
There's also a trauma system- if the priest has something happened to her in a dungeon- she may become traumatized permanently.. She can be kidnapped or maybe simply the hero is knocked out and she's hurt in the meantime. But trauma comes by creature type and level of severity AND acts against her. It's acts in one way as a permanent debuff- so if she has bad experiences with goblins.. depending on what they did- running into them may make her recall events and act different ways and acquire certain debuffs or even buffs. She might stop listening entirely to the hero at that point or give into urges.
There's a lot of scenarios that will take priest out of the party and you're able to get a report on what happens to her(when she's back)- control her yourself- or just watch the scene. Like an event where another party needs a healer. With the netorase on- and with ingame values- if something happens during such she can detail it to the hero happily when she's back. Or simply acting funny/nervous and not explaining to the hero. It is really dependent on the propensity of the hero and values of Priest which will change depending on a ton of choices ingame. Which makes it nice that it will also be in ENGLISH... as the game will be shaped so much around choices. This is a game where just corrupting priest as much as you can is not how you get scenes- rather it's just how you get a certain type of scene and you will miss out on many other scenes by doing it this way. So playing naturally and seeing how things turn out is likely the most enjoyable way.
I think the things that will change scenes the most is the on/off filters of several genres at the beginning of the game. You can have everything on- but I think it might be a bit harder to keep things entirely within the route you want to take without many save/loads. There are many events that are RNG based and you can't control everything the way you want. Even with everything off- it is still very much a porn game and developer doesn't consider evil scenes as NTR- such as the hero losing in a battle and the priest being kidnapped and him not making it to her in time.. Those kind of events will still happen even with NTR off- as it's just part of the fantasy world the game is set in. Bad ends also can't be removed- nor can the trauma system.
There's many other details regarding mechanics but they would take too long to explain- he has multiple trials out though and continues to update and release new trials. He's also working on english versions of the trials.
I think the area lacking the most details is the world. afaik- Priest is a novice healer. Nothing special- but she has been around the hero for quite some time. Possibly childhood friends- I think it's up to you whether she and hero get into a serious mutual relationship early on or not. No matter what though- she very much loves the hero at the start of the game. There's tons of events in dungeons but also plenty of events outside- a large city was shown with tons of shops and enterable buildings and customization. There's a choice representing whether hero wants to be into the cuckolding at pretty much every choice. For instance at the inn- you can lend her to innkeeper to lower cost of the inn- or make it free completely depending on the level you "lend" her. I'm not sure if the choices are invisible or visible depending on ingame values though- and Priest does have the right to decline things she is uncomfortable with and hero has to right to decline her refusals... Which is more playing with values and also changing expressions and texts and visuals of the scene. rape/reluctant/okay with it/loves it/teases hero about it as he watches. etc.
Sub characters also exist- some being poll voted. I think we have a nun that has tentacles/or is a futa under her robe that the hero trusts to be alone with the priest now. There is a lot of variety in team netori. There's also plenty of costumes which if you've played technobrake games- goes without saying. As each piece of equipment changes the visual of the character it's equipped to.. One that was poll voted in was a slutty version of an existing wedding dress- which implies you can get the priest married ingame. And also probably MARRIED-...
I'd look through the ci-en articles at least with the CGs to understand how the different combat works and also what kind of events exist.