Oz+

The heroine had returned to her home in Kansas after the journey in the Land of Oz. Years have passed by, and she is turning seventeen soon. One day, three attractive guys show up at her house. Those guys are actually her friends from the Land of Oz, who went on the journey with her; the Lion, the Scarecrow and the Tin Woodman. “Let’s celebrate your birthday in Oz!” Excited by the invitation, she heads to the Land of Oz. At her arrival, she is put on the spot to choose a romantic partner. Her decision would change the future of the world. What will she choose to do and what will the future awaiting them be like?

[from Official site]