Salmon and the Hazel by Sam Burns

Jesse’s only priority in life is protecting the people he loves, so he’s determined to see Rowan Harbor’s wards rebuilt. There’s just one problem: they’re missing an ingredient that can’t be ordered online.
Jesse volunteers to search for the missing component in the realm of the fae, but his boyfriend, Sean, isn’t letting him go alone. The town has an enemy among the fae, so they’ll need to keep a low profile. Along their way, they find unexpected allies, surprising enemies, and a whole host of problems.
The journey is a test of their endurance, but also of their relationship and their faith in each other. Can they find what they need and get back home in one piece in time for the summer solstice?