Chocolate Banana Ice-cream

A kind man offering an ice-cream to a young boy on a hot summer day would change the boy's life forever. Being shown kindness for the first time by a stranger, Severus risks his life trying to save Florean Fortescue from his fate. However, the old man refuses to endanger him and does not run away, but makes Severus promise to watch the shop. Years later, Hermione learns of this.