I Made a Pact with a Magical Girl

He was trying to help his family grab some discounted groceries at the supermarket. By a twist of fate, on his way home he came across a magical girl in the middle of a fight. He rushed forward to help, doing the right thing. Then, somehow, he absorbed the magical girl's power. For the sake of world peace, he naturally became the human tool who helps magical girls transform! Only, there's something a little... unusual about the way they transform. Tang Zeye: “Ahem. You don't need to transform at a time like this, do you?” A certain magical girl: “Oh, you don't like it? (smiles)” Tang Zeye: “Keep going. Don't stop.” Also known as The Magical Girl and Her Power Won't Leave Me Alone! That Day, I Became Her Light! There's Something a Little Hard to Describe About the Way She Transforms.