Yumi and her aunt, Fiona, walked around the city, enjoying the city's sights, food, and watching a movie. As the sky darkened, they arrived at an open field.
Yumi looked at Fiona, and Fiona looked at her, asking, "Are you ready? I'm not like your teacher, so I might not be able to control Devil's power completely and you will be in intense pain, Do you still want to do it?"
"Yes, I want to grow strong," Yumi said. After fighting against hundreds of wolves in the dungeon and almost dying, she realized that the more powerful she became, the safer she would be in the future.
"Okay," Fiona nodded. This was also the reason she was desperately searching for Yumi. She wanted to make Yumi strong so she would be safe if one day all of humanity turned against her.
"Your innate ability, Devil's Daughter, has five stages. The first stage is the use of evil mana," Fiona explained, tapping Yumi's forehead, and evil mana rushed out from her body.