This MC is just disappointing. I stopped playing after chapter 1 because I became too annoyed with the MC and disinterested in the non-existent story. And no, worldbuilding does not equate storytelling, just as troubled characters can still be one-note and don't create a character-driven story.
I liked the start of the game, seeing the MC take out a group of mercenaries. He's shown to have skill and determination. However, as the story progresses, these qualities don't get to shine. He finds himself engaged to the granddaughter of what could be called a magical mafia boss and soon realizes that he's weaker than everyone there.
To make matters worse, this same guy will explain how he orchestrated events so the MC would end up in his family eventually and that he specifically put Cerys in his path to lure him in. The MC thanked him for this.
Our MC is also a constant target of "ribbing" and "pranks". While the game tries to present it as good-natured and funny, it's mostly one-sided, certainly where his fiancée is concerned.
Of course, the women will gang up on him and are extremely competitive toward him as well. This gives the impression that the MC is just a whiny bitch, a punching bag, or a masochist, even if he says he'd hate to be one.
For instance, on a certain morning, the MC wakes up next to a demon's head (decoration). He's startled and lightheartedly confronts his fiancée at the breakfast table about it. She acts as if she didn't do it, and other women take her side.
Does the MC do anything to get even? Does he play his own pranks? Of course not, he's not powerful enough. The only thing he can do is take the abuse, complain tepidly, or say that he likes the treatment.
Another reviewer said it already, and I agree; this story is Cerys' story, not the MC's. He has no say and no real value now that he taught others his way of doing magic. This story is about a man who's a glorified breeding bull in a gilded cage, encouraged to create magically adept offspring.
Before playing this AVN, first decide if the characters' physical properties are enough to get you invested. The game itself will do little to endear them, so their bodies are all you have to go on.
The main reason for this disconnect between me and this narrative is, I think, that characters are introduced badly. There's more concern with worldbuilding and extensive exposition than actually introducing characters. Despite not having seen Cerys for 5 years because he ghosted her, the MC manages to pick things up right where they left things off. Except the part where Cerys will get even with him using pranks and humiliation, of course.
Instead, the writer could've let them reconnect for a while first, so the audience gets to know the characters. We don't have the MC's experience or history with them, after all. An important aspect of this is the exploration of boundaries. Why not have Cerys go too far with a prank? Why not let him get angry or disappointed to show the audience that he has limits to what he'll endure?
Another thing I've noticed is that the point system is very one-sided. It will only check if the score is above a certain value, not below. This means that renders and general dialogue will always increase in casual intimacy even if you have 0/50 points with a character. There won't be a remark that this MC isn't the person they knew because of a low score or that he doesn't seem very invested in the family's mission.
On the positive side, I really like this game's UI design. I like how choices are handled and how visuals and UI elements are used for effect. It's clear a lot of effort went into this.
One nitpick is that the dark red font on top of the dark background is difficult to read in the preferences screen. The lack of a scrollbar also obfuscates the audio options at the bottom of that page.
Objectively, the renders of this AVN are nicely done as well. They're pretty, with good lighting/shadows and environments that fit the locations and themes nicely.