Seiken Tsukai no World Break has a very unique magical system and reincarnation theme. I have never seen any other anime that creates something similar to what Seiken Tsukai no World Break introduced. To understand this unique magical system, there will be some spoilers to this review.

(Picture Source: Amino Apps thru' Google Image Search)

First of all, students who attends a private school in this world are all people who used to be a hero or villain from their past live. While attending school in modern day Japan, these special students also inherited both their powers and memories from their past lives. Within the school, those with exceptional strength and control over their powers will be recommended to join a special squad created and under the orders of the school to protect and defend Japan from monsters that crossed through time and space.

(Picture Source: Amino Apps thru' Google Image Search)

Next is the magical system. Unlike many other anime where people simply chant, wave their wands, or even just snapping their fingers, Seiken Tsukai no World Break makes their characters perform spells in a very unique way and one that I have yet to see appear similarly in other anime. Reincarnated villains will need to write out their chants before the spell could work.

Of course, in reality, the effectiveness of it is really questionable because the higher the level of the spell you wish to use in this world, the more you will need to write out. However, the magical system is quite unique, and it is applied only to reincarnated villains. I think it is a way to differentiate between the reincarnated heroes and villains in the series.

(Picture Source: The Chuuni Corner thru' Google Image Search)

With a better understanding of the magic system and the world building, we could now take a look at my thoughts on this anime.

Our main protagonist of the story, Haimura Moroha, is definitely not your typical student with only one past life. The story focused a lot on Moroha's desire to protect the people he loved, not just from the time and spacing crossing monsters, but even from humans who threatened the safety of his loved ones. There was an arc where he single-handedly went up against the Russian leader for the reincarnated.

However, the anime has some triggering factors that is understandably the reason for its lower popularity. The series has its usual harem genre revolving around Moroha and sexual-related advances but it is very subtle (the character who does it is just crazy about Moroha's butt for some reason).

(Third reason in the spoilers here but be warned that it may be uncomfortable for some of you)

Spoiler, click to view

Of course, the triggering factor is mostly the incest relationship Moroha had with his sister in his past live which was carried forward to modern day. While there are arguments that they are no longer siblings in this age, it still puts quite a lot of people off that Moroha is still willing to pursue a romantic relationship with his reincarnated sister.

(Picture Source: The Chuuni Corner thru' Google Image Search)

Despite the negativity I mentioned, the series is still an enjoyable show for me. Thankfully, whatever I mentioned in the spoiler isn't very obvious in the show as Moroha seemingly favours the other; I would chalk it up to him feeling obligated to keep her happy and play along because of their relationship in their past life.