Discoveries - Riko Sakurauchi x reader (Love Live!)

Y/n L/n, a student that studies in Otonokizaka High School has a certain crush on a girl. What happens if the said girl confesses to him but after a few months leaves without warning and say? How does one search for something he lost out of the blue? Is it through persistence and hardwork? Or is it by luck and circumstance? Find out in this book!