The Testament of Sister New Devil

I don't know how you arrived here. Maybe you came from the anime and wanted to check the original material out, or maybe you already read a Light Novel like this and wanted to give another one a try. Before you decide on giving this one a go or skiping it, let me tell you what I thought of it. The story doesn't start off too complex. The main character is a former member os the hero clan and his two addoptive sisters are from the demon clan. The main character wants to protect his family, and so they enter something called a Master-Slave Contract inorder to gain the strenght to fight against their enemies. That's basically what you need to know before starting. The first thing to note, if you came from the anime, is that a lot of scenes (especially from season 2) were censored. And I'm not saying that the violence was censored, I'm saying that the more lewd parts of the story were censored, so it might be worth going from the beginning with this one. For the most part, the story develops nicely, and so does the lewd parts. As the story becomes more complex and involving so does the lewd scenes. No matter for which reason you began, you won't be too disappointed with how it develops. This Light Novel has 3 story arcs across its 12 volumes. The anime covers the first 2, leaving only the last one behind. While the first 2 arcs are really good both in the story and ecchi departments, the last part leaves a lot to be desired. Stakes that were present during the majority of the story are suddenly gone because they became inconvenient and the battles become confusing with the sudden addition of new things that weren't present before. There are also other things that contributed to the last part not being all that great, but I won't dive into them since they would be spoilers. Just know that, if you're a bit sensitive on some topics, maybe let this one pass. If you're willing to see these characters' stories to the end, then give this one a try. But if you're here just for the ecchi, then maybe stick with the anime.

I watched the anime and read the manga but never read the LN. Having taken an interest for so long I finally read the LN. Honestly, the ecchi is quite good. I don't know why some reviewers say it's not good to read LN when it comes to ecchi. But, if you have good imagination, ecchi isn't a problem. Story/plot: It's quite good. Not the best but I like it because of ecchi scenes were the main reason I read the LN. It's hard to put a good story and ecchi together because some readers are not into echhi and want to focus on understandingthe story. I understand that part but I still like how the author wrote about it. Apart from having ecchi, we have of heroes and demons trying to maintain peace. The MC got expelled from the "village" and try to live as a normal human but later he got caught up with the matters with the demons. Trying not to spoil so much, MC has to fight and solve the problem who he wished to protect. That's basically sums up the whole point of the story and as I mentioned earlier. Not the best story but quite good that I came to like it. Also, I think it was volume 6 that I got so into the story that I actually have to re read a couple sentences twice if not three times... it was that good for volume 6. Characters: Very likable and you get to see character developments which is now a must when wanting a good story. I like all the girls that the MC has but if I were to choose the best one. It would be Chisato Hasegawa. Man, I love her so much. Her relationship with the MC is the best. In conclusion, if you're looking for a good ecchi scene with a good story, go ahead and read the LN. Or watch/read the anime and manga first to get an understanding of the picture. Honestly, you won't see this kind of ecchi scene from others LN. It sucks that that there aren't enough of this type of LN. But, I enjoy it very much and the ecchi was the best. Harem and ecchi go so well together that it made me remember how I got into it the first time...

tl;dr: An action harem series with a lot of ecchi, a well written plot, and a well fleshed out cast of characters with great character and relationship arcs. This series begins with Toujou Basara unexpectedly gaining two stepsisters: Mio, the daughter of the former Demon Lord, and her attendant, Maria. Basara himself isn’t a stranger to the world of Demons, seeing as he’s a former member of the Hero Clan, a group dedicated to protecting humans from Demons. However, after an accident where his powers went out of control he was exiled from the clan and began living the life of a normal student. But nowwith Mio’s being targeted by both the new Demon Lord’s faction and the Hero Clan, he’s forced to reawaken his abilities to protect her. Unfortunately, his strength isn’t at the level necessary to do so. But thankfully Maria has a plan that involves using magic to link Basara and Mio in order to make them both stronger through what is called a Master-Servant contract. The thing is that Maria is a succubus, and thus the magic is pretty lewd. This story is a mix of comedic slice of life and more serious action/drama, and overall, it handled the blend of the two really well. The goal of Basara and company is ultimately just to live like normal humans. And in the case of most of them, that means living like normal high school students. They spend a decent amount of time doing so, though even when things are completely peaceful the Master-Servant contract ends up triggering and causing various ecchi mischief. In addition to this pretty much always being really amusing, it also often does contribute to character arcs and relationship development. Also, I think this series has the best handling of ecchi I’ve ever seen. In most series ecchi gets repetitive pretty quickly because it quickly hits the maximum level it’s going to go and then it just stays there. This series has a very steady escalation curve wherein it starts off not that extreme but ends full H, which made it interesting and enjoyable from beginning to end. Though Basara and his friends just want to be left alone, the rest of the world unfortunately isn’t willing to do so. And thus, they often have to be proactive in dealing with problems before they become too much to handle. There’s a pretty interesting plot with a good amount of solid world building regarding various factions that Basara has to navigate not just through defeating his enemies but also through dealing with the political situations surrounding the conflicts. Basara is very interesting when it comes to dealing with all this because he’s very pragmatic and is willing to do things that are pretty sketchy, though the plot doesn’t require him to do so all that often or do things that are beyond the pale. There are ultimately three main factions, the Demons, the Heroes, and the Gods, though each also has various subfactions with the plot heavily centered around the conflicts between said subfactions. The plot does a great job at fleshing out the demons and telling their story to completion. The plot does a decent job in terms of the heroes, but it definitely felt like there was more left that wasn’t dealt with. The plot barely even touches on the Gods in what felt like a pretty big omission as there was a major plot thread related to them left unresolved. In one of the afterwards, the author mentioned that he was planning on writing a story featuring Basara’s father as he deals with said plot thread, but it seems that’s not happening, so it seems that plot will remain forever unfinished. Action wise for the most part is pretty basic, but pretty solid. Characters have pretty clear ability sets that grow over the course of the series. There’s a good amount of variety so things don’t really get repetitive. And in general things flow pretty well with a lot of cool moments and satisfying victories. The action in the final arc felt like a break from that in that it felt like it was overtly convoluted and random. It’s heavily tied to the classic Japanese elements, the classic Chinese elements, and how the two are connected. Elements played a part in the action even before this, but in a more generic fashion. This felt a major escalation in complexity. On top of that, it also ties things heavily into very specific geography. There’s similar things before this, such as Byakko’s relationship with the cardinal direction west, but the final arc escalates things to the point it feels like you need to have a pretty good grasp of the map of Tokyo in order to properly understand what’s going. I suppose in regards to both the elements and geography the issue may arise from the fact that the target audience generally does possess preexisting knowledge on the subject that I do not. But as most reading this review will fall into the same category, I think its still fair to say that I felt the action in the final arc was hard to follow and dragged on too long. Character wise, overall, the series has great character and relationship arcs. As mentioned, there’s a good blend of serious and comedic moments, and this brings out different sides of characters and helps flesh them out. There’s also a lot of variety to the heroines and they have great chemistry not only with Basara but also each other. As a result, everyone is pretty likable and it’s easy to get invested in everyone individually and the group overall. There are also some pretty great side characters. The primarily highlight being Lars, who’s just as cool if not cooler than Basara. It’s pretty rare for the protagonist in the genre to have competent and cool male friends, so he was certainly a very pleasant surprise. There definitely were a few weak spots in terms of the cast though, mainly towards the end. In addition to Basara, the heroines that have great character and relationship arcs are Mio, Maria, Yuki, Kasumi, and Zest. With Hasegawa it felt like the writing trying to portray her as a mature and wise character above needing a character arc, so she doesn’t have one at all. She has a pretty solid relationship arc though. The other two heroines, Nanao and Celes, have character and relationship arcs that reach a solid enough conclusion, but they felt really rushed towards the end in getting there. There was another character, Rikka, that had a character and relationship arc that was slowly being developed throughout the series, but in the end the series ended without doing anything with it, which was pretty disappointing. Still, even with these issues, the ending and epilogue were still fantastic and an incredibly satisfying conclusion to the series. I should also note that the art in this is downright incredible. The character designs are varied and amazing too. They’re also used really well in both the action and ecchi. The fan translation is a mixed bag since it involves multiple translators, but the weaker parts are mostly all towards the beginning so I definitely think its worth pushing through them. The side volumes, Light and Sweet, mostly felt like a waste of time. They’re just fluff, but it’s not very good fluff and is much weaker than the main series. They’re not written by the author of the main series so I suppose that shouldn’t be too surprising. The art in Light is also from the artist of the manga, and it’s decent but nowhere near the main artist of the novels. The art in Sweet is done by the same artist as the main series, but for the point in the series that it takes place the art is pretty weak compared to the surrounding novels of the main series, so I can’t say I was all that satisfied with it either.