Haruka Drive!

Yuuya has a childhood friend named Haruka, who is innately frail and has been hospitalized since she was young. Aside from that, she's a normal girl who loves writing novels. Though she often treats him however she pleases, he cherishes her as a trusted friend. One day, she tells him not to visit until she finishes her book. Reluctantly, he agrees, spending the next week restless with anticipation. But when he returns, he's greeted by a fantasy world, where a girl who looks exactly like Haruka stands beside him. What happened to him, and what does the future hold? From Hau~ Omochikaeri!