Conception II: Children of the Seven Stars

Monsters have emerged from mysterious portals called Dusk Circles. People possess special marks and train at the special school to battle these creatures. Therefore, they become Disciples, and the seven deadly sins create different labyrinths. These warriors fight monsters but cannot enter these mazes because their powers fade inside. At the same time, a new male student arrives at the academy and meets two friends. They are safe from a monster attack and receive their rankings. Fuuko achieves the highest S rank, while the protagonist gets an A. In addition, extraordinary power levels appear after that, and the main hero will use a unique ability to enter the Dusk Circles.