I have to say what makes this series shine if the characters for sure. The MC, the father, is really a nice guy. He is a bit timid in the very beginning but he genuinely cares for his daughter and will honestly do everything in his power to make sure that no harm comes to her. His interests as a mystery novelist was a nice touch but he is character who does seem smart enough to pull off what is depicted. My personal favorite character though is the mother. She is loyal and cares about her daughter as much as her husband. From the very beginning her trust in her husband is shown to be pretty high. She can think on her toes, but the author does not indulge in any superhuman feats - she is the same as her husband - someone who trusts her spouse, wants to protect her kid, and will do everything in her power to keep her family safe. The daughter is yet another great character - not because she is particualrly virtuous, though you can't really say she is a bad person in anyway, but because the story doesn't try to adjust her to the plot. It doesn't take her long to realize what her parents are doing for her and she reacts in kind. The rest of the cast is pretty fantastic too but its getting too long. The characters along with the plot are the strong points on this manga.
The plot is excellent as well, realistic 50 something man with a college age daughter kills likely dangerous boyfriend to prevent his daughter from coming to harm. The pact throughtout is very well controlled, its a slow burn that will masterfullly build up tension. Covering up the crime and dealing with those who got tangled up in it - the story takes everything at the pace it should and nothing is forced. The reader isn't thrown for any loops with the logic - everything makes sense and the MC isn't some psychic who can figure out everything from an out of place book or something. You get to see all the stress that comes with planning every step of this out and the real danger in what a misspeak or uncaught error could bring. Those trying to catch the crime stick to their own motivations for doing so and the opponents that the father must face are not all the same or on a tiered hierarchy - they possess differing levels of intelligence and drive. Tosu, the father, must keep thinking and keep paying attention - creating plans and contingency plans for almost every action and likely reaction. In terms of coincidence - while there is some, it never favors the MC, you almost want to ask the author to give him a break at points but really its not unrealistic either. Thing can go wrong and the MC is an amateur. There are a lot of variables, and there is a lot the MC wants to keep hidden even from his daughter - a smart and kind decision imo. There is one part of the story, that while I do like, isn't explained from the get go fully. Its the wifes character - it makes sense given the consequences to perhaps cover the murder, but for her to endure the level she did is only explained by her own family and past with Tosu. Its a more than satisfying explanation and one that also sheds light onto why Tosu treats his own daughter how he does. Afterall it is the reason why they are in this mess to begin with. All the characters as mentioned above, are full and have their own personalitiles, pasts, and motivations and all act in a reasonable manner. Thats not to say some of the characters are exceptional in some way, but just that it isn't something the author pulls out of his ass. The MC did catch a break, but really given how fully he was dedicating himself he would have caught something. Lucky for him it did turn out to be there, but even here the author did show that the MC had a basic idea of what would needed to be done had nothing come out of that encounter.
If I had to say something - this should probably have ended around chapter 50. The continuation of the story isn't so much a rehashing (don't worry) but an afterstory caused by a bad accident.
The art definitely gets the job done, and it really shines in character design and expression. Without this the story would not have been as impactful.
10/10 - A very enjoyable weekend read, there is quite a few chapters so you won't finish it terribly quickly but its not so long that it'll take more than a couple of days. Highly recommend
