One day, you leave the school at the end of the school day, and at the exit you see a beautiful mature woman, she is looking for her son, but when she sees you, she starts walking towards you with a smile, And when he is in front of you he tells you

"－Hello! I am Fumiko, Gen's mom, you know, he has told me a lot about you, and he tells me how you defend him from bullies, I'm very grateful for that! Please tell me How could I reward you for helping my son, in gratitude"