Updated for 0.7.3:
In terms of adult indie games, this is in the elite tier. I think of it as a VN version of Friends with kinks, although I think this is better than Friends was.
I enjoy femdom in games but there aren't many games with it. This one is balanced with femdom, maledom and vanilla. As the apparently rare completionist I am, I try to view all routes and content, and if it's well written I can find enjoyment in all of them, although perhaps a bit less so outside my specific preferences. If you only prefer one of the above you will find plenty in this game. If you play all three you will get a considerable amount of content.
It's a slow burn and ramps over time, your choices give you different dialogue and of course can give you different relationships and scenes. For the most part there is a common route, some chapters stronger than others. The game has a wide cast of LIs, and each LI can have several distinct paths. The game has a "scenarios" option that allows someone to select the specific LI and path, giving the player a streamlined method of seeing each story. I'm not sure if the scenarios allow someone to experience 100% of the story. Even among each route there are many other branching options that might not be available in the streamlined story mode.
Kinks/lewd content are gated behind a "skills" system. Most dialogue options fall under one of 4 skills, each representing a tree, selecting dialogue gives you points in that skill. All of this is explained at the start of the game. Skills and LI information (including paths) are always accessible from a UI option on the top of the screen. There is never a lockout from not having pre-purchased a skill---you will always be shown the skill needed and have time to purchase the skill, if you have the points. Points will probably max out in at least one tree (and another shortly after) by Chapter 6 on a normal option play, but you can also select a "Relaxed" mode on future play that gives you double points, and will allow you an even easier time to purchase skills. You can also always rollback and try different options, the rollback will at least go back several lines.
If you are first discovering this game there is considerable content, the game is somewhere around 70-80% or so complete. I don't know the exact number of hours for a single playthrough, but you will need several to experience all the content. While waiting for updates, this means the content for each route will feel smaller with longer update cycles, but when this game is fully complete it means you will be able to try different routes to see different things. At this time it is at least as long as a mid-sized professional VN, possibly on the longer side. I have 48 hours played with a 90% dialogue read (you can see this stat under the options section of the game). I can't say how many of those hours or what percentage of missing dialogue is from updates changing the totals. When this game is complete and if a person first starts at that time, I'm sure the hours will be lower, but it's still an indication of a lot of content.
As of the 0.7.3 release, the dev has indicated 2 more chapters, updated in probably two parts each chapter, and a possible epilogue. Chapter 7 complete was released a few days over a year from Chapter 6. There were however unique circumstances involved. Speculating on 5 more content updates, at 5 months apart each, and the game would complete in just over 2 years. Note these are just estimates from me, not the dev, and I will update this if there is more information and if it would be helpful. At some point the game will be complete and there will be no need to worry about updates. But as of now it's still a very strong amount of content and there is no need to wait to play it. Saves have always been compatible between updates.
In terms of adult indie games, this is in the elite tier. I think of it as a VN version of Friends with kinks, although I think this is better than Friends was.
I enjoy femdom in games but there aren't many games with it. This one is balanced with femdom, maledom and vanilla. As the apparently rare completionist I am, I try to view all routes and content, and if it's well written I can find enjoyment in all of them, although perhaps a bit less so outside my specific preferences. If you only prefer one of the above you will find plenty in this game. If you play all three you will get a considerable amount of content.
It's a slow burn and ramps over time, your choices give you different dialogue and of course can give you different relationships and scenes. For the most part there is a common route, some chapters stronger than others. The game has a wide cast of LIs, and each LI can have several distinct paths. The game has a "scenarios" option that allows someone to select the specific LI and path, giving the player a streamlined method of seeing each story. I'm not sure if the scenarios allow someone to experience 100% of the story. Even among each route there are many other branching options that might not be available in the streamlined story mode.
Kinks/lewd content are gated behind a "skills" system. Most dialogue options fall under one of 4 skills, each representing a tree, selecting dialogue gives you points in that skill. All of this is explained at the start of the game. Skills and LI information (including paths) are always accessible from a UI option on the top of the screen. There is never a lockout from not having pre-purchased a skill---you will always be shown the skill needed and have time to purchase the skill, if you have the points. Points will probably max out in at least one tree (and another shortly after) by Chapter 6 on a normal option play, but you can also select a "Relaxed" mode on future play that gives you double points, and will allow you an even easier time to purchase skills. You can also always rollback and try different options, the rollback will at least go back several lines.
If you are first discovering this game there is considerable content, the game is somewhere around 70-80% or so complete. I don't know the exact number of hours for a single playthrough, but you will need several to experience all the content. While waiting for updates, this means the content for each route will feel smaller with longer update cycles, but when this game is fully complete it means you will be able to try different routes to see different things. At this time it is at least as long as a mid-sized professional VN, possibly on the longer side. I have 48 hours played with a 90% dialogue read (you can see this stat under the options section of the game). I can't say how many of those hours or what percentage of missing dialogue is from updates changing the totals. When this game is complete and if a person first starts at that time, I'm sure the hours will be lower, but it's still an indication of a lot of content.
As of the 0.7.3 release, the dev has indicated 2 more chapters, updated in probably two parts each chapter, and a possible epilogue. Chapter 7 complete was released a few days over a year from Chapter 6. There were however unique circumstances involved. Speculating on 5 more content updates, at 5 months apart each, and the game would complete in just over 2 years. Note these are just estimates from me, not the dev, and I will update this if there is more information and if it would be helpful. At some point the game will be complete and there will be no need to worry about updates. But as of now it's still a very strong amount of content and there is no need to wait to play it. Saves have always been compatible between updates.