Oz is a girls' dating simulation visual novel moblie video game told from the prespective of Dorothy Gale as she dates male characters loosely based on the Oz series.

After the journey in the Land of Oz, the heroine had returned to her home in Kansas. Years had passed since then, and her 17th birthday was drawing closer. One evening, there was a knock at her door. She opened it and there stood three handsome strangers! ...Wait, they were actually her old mates from Oz; the Scarecrow, the Tin Woodman, and the Lion!
“Come on! Let’s celebrate your birthday in Oz!”
So excited, she headed back to the Land of Oz.