TLDR
Jonak set a mission to island of the dragon to ask the dragon for help due to increasing cases of abduction of women by the Orcs species wherein they were used as surrogates for reproduction. He also did this to protect Isle, his only childhood friend and the one he loves
Jonak sailed for 3 years before he arrived in island of the dragon. Adain found Jonak unconscious and brought him to his castle/house. When Joank regained consciousness, he explained to Adain why he came and Adain agreed in the conditioner that he'll become his mate.
Jonak and Adain flew to Jonak's village and found Ilse is now married to Bernard thus breaking her promise to wait for Jonak. Jonak acted rude to ease Ilse guilt and make her think that it's a good thing he didn't wait for him. Jonak and Adain burned the Orcs den and rescued the captive women. Ilse see through Jonak act and apologize for breaking her promise. Jonak and Ilse parted ways
Jonak and Adain still investigates the case of Orcs abducting women for reproduction with the help of Adain's brother, Luscious. Adain started teaching Jonak to read and write. Jonak opened about his past when he was an outcast after witnessing the abuse of children in the hands priest of their village. Adain felt guilty and did not sleep beside Jonak.
Time passes and Jonak is fishing when an Orc is drowning. He tried to save it and Adain came and help the Orc. As a thank you, Orcs explained why they abduct women for reproduction. They now have a lead to the case.
Jonak and Adain received a letter from Bernard stating that Ilse is dead. Adain was shocked and thought it was because of Orcs but Jonak clarified that it is because of old age and Ilse actually has grandchildren already. They are immortals so the lost sense of time. They traveled to Jonak's village to visit Ilse gave
There are things in between that happened like Adain started having feelings for Jonak without realizing its love but he became more affectionate and attentive to Jonak. Jonak on the other hand just started to catch feelings for Adain
I am lost