Hiraga Minya

Meet Neruma Isami, more commonly known as Neru. His martial artist grandfather left behind a book which serves as his only guide for his solitary training. Neru's about to finish middle school and is totally unsure about his future. But everything changes when meets the mysterious martial artist Akebi Haiba. She leads Neru to a high school where the toughest fighters have assembled. This martial arts high school action series now begins!

The manga centers on the titular character Neru who has read a book of secrets and is a self-taught martial artist, who appears at a school for famed martial arts families, trying to get in.