The Hunt for Havarlorn Hills by Mirajane

Somehow I knew I would regret meeting Avery Fletcher.
I wanted her like I had never wanted anyone before.
And it was going to get us both killed.
I vowed my sword, and my life, to her the night she decided to join Odin’s Shadow
And I immediately regretted it.
Every minute spent in Alfheim is borrowed time
And I don’t know if I can handle it when ours runs out.
But I have to protect her from her guild—and herself.
Even if it means facing my greatest fears while the game itself turns on us.
Something’s coming for all of us.
I won’t lose her. I can’t.