Rescue and mutation

1 day later.

"Arghh~!"

"Gray are you okay?"

"Yes... Gramps."

Gray shake his head. His primal instinct become more unstable and felt his body will explode. He know he must search and prepare a mate before the age of 12. Sorahiko looked at his grandchild with worried expression he know Gray suffered from beast instinct from the group of mythical creatures he transformed.

"Here eat some Taiyaki."

"Gramps, We have no another food supply other than Taiyaki?"

"..."

"Do you have a problem?" Sorahiko looked at Gray. As, he raised the book at his hands. When he saw the book he immediately shake his head. He was wandering where the book came from.

"Did you think something rude?"

"..."

"No..."

***

Gray goes with his daily routine. Once, he finished he practice his fighting style against his Gramps or he visit the forest. When he passed at Grandma's house he saw her standing at the gate waiting for someone.

"Yui~!"

Yui looked at him and she immediately give him a bento. "Eat..."

Gray saw her action. He smiled and received the bento "Yui! you're really my angel sent from above. Yes! this is the thing can be called food."

Meanwhile,

"Achoo~!" Sorahiko sneeze and looked at Taiyaki drop from the ground. He felt guilt and pity.

***

*stare*

"What? Do you want to touch my ears?"

"Yes, can I?"

"No way! they're sensitive, but you can touch them. If let me touch yours." Gray looked at Yui and give a wink. Yui who received his gaze blushed and whispered "Pervert..." before leaving him alone together with the bento.

"Sigh~! this is hard..." Gray looked at Grandma's house. He know if Yui touch his ears we will lost his self control especially she has a good body who entered at puberty.

***

Few hours later.

Gray returned home and made a preparation for his training. Sorahiko looked at his Grandchild and looked for something. He shake his head while looking at him.

"Gray, are sure at your decision. Do you know today or tomorrow is Full moon. You will suffer from the Full moon Effect from your Quirk."

"Gramps, it was better to suffer from Full moon effect than the 7 years of misfortune especially I plan to apply as a Hero in the near future."

Sorahiko nod his in understanding. He know his frustration as he suffered indirectly from his Grandchild's bad luck. Once, he remembered those days he shuddered and thought 'Gray is right! Full moon effect is much better than 7 years of misfortune.'

"Good luck! kid please came back safe and complete."

"Okay!"

***

"Blood?" Gray frowned as he entered the forest. He didn't know, but his instinct telling him a strong enemy is inside the forest. He followed the trail of blood and he scent another person.

"Yui?" His eyes started to glow in his anger like Fenrir from Norse Mythology. He take a deep breath and calm himself. "She is safe, but where did the blood came from?"

Gray stopped and ponder. Once, he realized the danger. He transformed himself become a Kitsune and he immediately follow the trail of blood while floating. He know Yui will be in trouble. As, the instinct keep screaming 'A strong prey is here.'

***

Yui entered the forest due to her Grandma's request. When she entered and discovered an abnormalities. The forest is silent without any sounds from any insect nor a cry of bird. She felt a strange feeling like she will face her death. Once, she stay longer inside the forest.

"..."

She stopped and heard a voice of who seek for helped. "Someone... H-help me...*cough~!*"

She felt a chill passed her and she immediately made a move. Where the voice came from and saw a person lying in the ground a naked women. Once, she step closer she felt something strange at her like she was a corpse and a sticky substance at her body.

"spider web?"

Yui pick the branch at the ground and she tumble after she felt the danger. Once, she tumble she saw a Sharp claw looked at the tree and she discovered a Giant Spider.

"My God..."

"ShiShiShi~! HELP... HELP ME.... ShiShiShi~"

The spider imitate the voice Yui heard earlier. She trembled and become pale. Yui want to run away, but she felt a sticky substance at her body. She know her life was in danger. A tears flow from her eyes and whispered "please... save me Gray..."

"Boom~!"

***

Gray moved faster and saw Yui was captured by a Giant Spider who was using Quirk. He was awe and made a decision. He transformed to a human kyuubi and immediately summoned a three fire wisp at his hand. "Burn!"

"Boom~!"

"Argghh~!" The giant spider screamed and looked at her new prey a Fox with human appearance. She throw a acid from her mouth. Gray dodged the acid and ignite the spider web.

"bang!" The Giant Spider was fallen at the ground. Gray jumped above the Spider's head and release a lightning at his arms and stab it.

"Argghhhh~!!!" The Spider was roasted from her head and died. As, her body twitch and Gray took some samples for research and Fossilized them.

***

Yui witnessed everything and she was amazed. She whispered "strong... beautiful..."