First game and A romance

There's a one guy who came from another world and currently he's in the city where Yoona lives. He keep appearing of yoon's dream and then one day he showed up in person to yoona.One day at night yoona Dreaming again and waiting for that guy to show up but it never happened again . She keep waiting and days go by suddenly jeseung showed up. He want yoona to wake up from the world of tale.