Haruka’s Biggest Fan is the 3rd substory in Yakuza 6.
Kiryu witnesses an argunment between a fan of Haruka's and her mother. The little girl begs her mother to buy some of Haruka merchandise, but the mother refuses, saying that Haruka is a bad influence due to her ties with the yakuza. After she leaves, Kiryu talks with the girl (named Ayaka) and promises to find some merchandise for her.
When Kiryu returns from Ebisu Pawn with the picture of Haruka, she thanks him, rewarding Kiryu with a drawing that she did of Haruka.
- Find Haruka merchandise