Magical Girl, Level up Alone!

After Su Bai was reborn, he gained the ability to transform into the 'Magical Girl Bai Jie'. I thought he was given the mission to save the world, but—— [Main mission: Compete with 17 magical girls, win, and obtain the source of magic. They deceive each other and kill each other. He gradually found that he had been involved in a killing game that he could not quit. Fortunately, Su Bai's magical girl is different from other magical girls. He has one more attribute panel than others. Others accumulate experience through actual combat and slowly improve their strength, but he can gain experience through actual combat and directly increase his data and level, and there is no level upper limit! Since then, he has embarked on the path of upgrading alone, unable to extricate himself! Can't beat it? Then I'll upgrade! Someone wants to harm me? Then I'll upgrade! What? Is this world dangerous? Then I will continue to upgrade! A few years later, the source of disaster struck. "Magical girl Bai Jie, you have no obligation to face an enemy that you can't win at all. Do you understand?" A group of magical girls who had reformed their evil ways stopped the transformed Su Bai and tried their best to dissuade him. After returning from leveling, Su Bai looked at the ∞ shown in his various data, and then faced the source of disaster resolutely. "Can't win at all? I don't understand!"