Absolute Duo is another school for the gifted harem type anime. Students who go to this school are selected because they can manifest a blaze..or a soul weapon. Toro is the hero heart of this story. He is an exception because instead of a offensive weapon he manifests a shield, something no one else has ever had.
The first episode we find out that the students much fight each other for a place at the school. Paired up which ever wins the battle finds a place in the school. Once the first battle is over the remaining kids find out that they need to pair up and train together as they will be fighting other teams.
The Place is to trin up the perfect duo of fighters to protect the world.I think.
Now the only issue is the overt (mostly) sexuality…they tease a lot for sure so don’t have your younger kids watch this