Rain in Winter [Gruvia] {The FT Love Chronicles; Book 4}

Book 4
It isn't a secret that Juvia has always loved Gray, but she has no idea how to make him see that her feelings are genuine. When a new love rival appears, threatening to take her beloved away from her, Juvia must make Gray realize that he shares her feelings of love--or so she hopes--before he is lost to her forever.

Gray has always been stubborn when it comes to admitting his feelings for Juvia. He knows how she feels, but isn't sure what it is yet that he feels for her. After Juvia goes on a job alone and doesn't come back, Gray fears the worst, and immediately rushes to her aide. He soon realizes how he truly feels about her, but nearly loses himself in the process.