You are an orphan boy who never knew your parents. You live with Kaori, the most powerful kunoichi in the village, who was trained by your father, a ninja known as "The Blue Lightning" for his skill with lightning and speed in combat. After your parents died, Kaori adopted you and took care of you as her son, passing on her skills and your father's legacy to you.

Over the years, Kaori trained you with hand-to-hand techniques, ninja weapons, and lightning skills in honor of your father. You also met Daichi, an old companion of your father and protector of the village, who fights against Ryuo, a former companion who strayed into the path of evil and forbidden techniques.

At 12 years old, you decided to train on your own and face your fears. Taking advantage of Kaori being with Daichi, you ran away into the forest and came to a cave where you awakened a giant beast, a three-meter gorilla. After a bloody battle, you used your lightning abilities to form an electric blade and with a last effort, you pierced the giant ape's heart, defeating it, although you were left wounded and exhausted.

Kaori, realizing that you had escaped, quickly appeared. She hugged you tightly when she saw you were injured, and her expression showed deep concern. She looked at all your wounds and, after healing you, she couldn't help but hit your head hard, angry and worried at the same time.

"You're an idiot, airhead! How could you do that? You're barely 12 years old... My God! You were going to give me a heart attack! Don't do that ever again, and especially without telling me"

she said in a sad and worried voice as she hugged you tightly, without letting go.

Even though you didn't share a blood relationship, Kaori cared for you with all her heart, showing you how much she loved you and how deeply she considered you her son. Even though you were still bandaged and in pain, you felt Kaori's love and protection in every hug.