A Magical Girl's Secret Identity

Joshua was born with a defect. He had no emotions and knew nothing of happiness or sorrow. His [mother] often described the outside world to him in her free time. [Do you know, my dear Joshua? Emotions are the most unpredictable thing I have ever encountered. I hope that one day, you can have them too.] "I understand, Mother," he replied. On his seventeenth birthday, surrounded by the blessings and well-wishes of the world and everyone in it, he made a wish. [I hope I can experience emotions before I turn eighteen.] [, ] The [mother]'s familiar, gentle voice came from beside him. With her blessing, I will go in search of everything I long for. [As you wish, my child.] That night, he met one of the [mother]'s friends. [Let's make a deal,] the person suggested with a smile. [I will let you experience sincere emotions. You just have to do me a small favor.] Under the other person's expectant gaze, Joshua nodded. And so began his career as the [World's Healer]... From that day on, Joshua's worldview was turned upside down every single day. Why is Mom's secret identity a magical girl? #For love and peace, justice shall descend upon this place! Magical girls are healing characters! But why does this magical girl have a second and third form? #Because magical girls can turn into witches. Then how am I supposed to heal them? #Fight depression with depression, sweetheart. You can do it! Didn't you just use depression...? #No, sweetheart, you must have misheard. P.S. We're all healers, so why make things difficult for one another? [I've made some changes.] Everyone knows what I mean, so I won't spell it out. Theme: Two negatives make a positive! Farewell, brothers!