This show HAS potential to be really good, yet some technical faults betray it. At first I think it will be sucked, but it turned to be false because of the nice plot. Being adapted straight from the comic, the scriptwriter does not to be very adventurous to explore everything. The plot, at least until the middle episodes, are unpredictable. It's like finding a treasure hidden somewhere, well, the title says all, though. The makers are successful to make the audiences keep wondering what's up next. Yet, the turns and twists are executed well, at least on paper. Some parts are a bit repetitive, but it's still OK and logical. I realized that this drama has very same director as my favorite show, Suzuki Sensei. Well, perhaps this guy is specialized himself at late night dramas like these. I even wondered maybe this guy also took Suzuki Sensei's cinematographer with him to do the job, since both dramas share same cinematography style. And they get the job done. However, it's seems directors job was weighed down by dismal acting abilities of most of the young actors and actresses, unlike in Suzuki Sensei. The actor playing Narumi is pretty inconsistent (sometimes acceptable, while some time others he just simply out of place). Most other casts are even worse. The actress playing Suga is good at acting cool, but her emotion bursts are nonexistent (cannot do good cry acting, for example). This character needs someone who is capability to do good nonverbal acting chops, so is some characters like Setouchi. Yanai-senpai's portrayal is badly executed, he is either overacting or just become wooden all the times. The worst is the actor playing the guy who just going insane after being told by Suga and cohorts. His acting is just very unnatural. Overall, only Origuchi and Suga's close friend are passable to my liking, but their parts are relatively small. It could've been much, much better if producers are willing to invest more on casting. I believe it will do the tricks. Finally, I expect some of you guys will end up hitting "not helpful" button due to my blantant criticism, but this is what I've got.