In this episode of "Podfic A Week" we read "They Grow Up So Fast" by SnailorBee

Haruta is ten when he sneaks aboard the Moby Dick (with his missing front teeth it sounds more like ‘twen’ and even with his brimming confidence, Marco isn’t quite sure he agrees with the age).

A little snippet into the life of a young Haruta after he joins the crew and Marco looks after him!

You can find the original fic on ao3.