Had a lot of fun playing this one. The pacing is excellent, and the mystery aspect really kept me going. Another great aspect of this VN is the level of involvement you have as a player. There are lots of choices to make, and it doesn't go long without your input, which I really appreciate.
However, I do have some issues with the plot. For the most part, the MC is great, assertive and confident—a nice change of pace from the usual loser MC; however, he is awfully trusting, and his tendency to spill all his secrets gets annoying, honestly.
In one of the last scenes with a certain LI, he drops a bombshell secret on her and the plot somehow implies that a certain LI has proven she can be trusted, however, she hasn't. No matter how good-natured she is, it doesn't change the fact that she's the daughter of the family that is closest to the enemy.
Of course, this inexplicable trust in the LI needed to happen because "plot," but it was too convenient and it's hard to believe someone who has been betrayed like the MC would trust the daughter of the enemy for no reason.
That aside, the plot of this novel is truly its biggest strength. It really got me hooked and can't wait to know what comes next. The only weak point is the relationship building part, imo. That last scene with that certain LI was particularly bad, it felt artificial. They whisper sweet nothings to each other, but to me, it feels like they don't mean it. One last thing is that the expressions could use some work. The dialogue is pretty lukewarm, so, at the very least, the emotions could be conveyed more strongly through the character's expressions.
Anyway, before it gets too negative, I'll cut the review short.
TL;DR: Very fun game, certainly stands above the average game, although it could be better.