Base story:
Absolute Duo follows the story of Tooru Kokonoe who wants to enter a school where he can learn how to use his Blaze, Blaze are the manifestation of the user's soul in a weapon.

Review + What went wrong in this anime:
The anime isn't the best anime but it's not the worst either (only for the ecchi/funny moments). The story is normal, nothing special you might find some plot twist but as I said before there is nothing so special, the anime also covers the background of the characters a little bit. About the characters there is nothing too special about their weapon (except the protagonist having a shield and another one that I won’t say due to spoiler), each of them has strengths and weaknesses. The music is good but only the Opening and the Ending. The soundtracks, sound effects, animation (except op), drawings and visual effects are normal; there is nothing special to tell about it. For me this anime is missing something about the main story that could have been a lot more interesting. I didn’t expect a lot from the first season but I wanted more than the anime showed. They could have made interesting weapons, story and abilities, the only thing that made me keep watching this anime was the funny and ecchi moments (and fanservice), and the anime also didn’t have anything special to make it stand out from the others. Also pretty most of the other characters could have been so much more instead, they are just standing there as punching dummy, fighting or giving some ecchi moment.

Final comment:
If you want to watch something and don't care about what you want you can watch this (ONLY IF THERE IS NOTHING ELSE or if you search for ecchi/funny moments in the anime you watch), but if you want something that is interesting look for something else this is nearly trash. The trailer was good and one of my friends suggested this anime to me when I was searching for an anime to watch, so I give it a try just for this, sadly at the end it was better not to judge a book by the cover. It might be better if a season 2 come out (that won’t come out) with more storyline. If you want there is a light novel and the manga (I didn’t read them) those might be better (MAYBE).

Score for my POV (if you want to see them):
Story: 4/10
Characters: 4/10
Music (Soundtrack, Songs inside the anime, Opening, Ending): 6/10 (just for the opening)
Sound Effect: 5/10
Drawings: 5/10
Visual Effect: 5/10
Animation: 5/10
I can't give more than 50 (this count as 5/10) and I give it just for mercy.

P.S. Sorry if my English is bad, It’s not my native language and if this review is bad in anyway (I usually don't write reviews), anyway I hope this was useful for someone. Thank You for reading this.