An adventurer living in a small village. In love with the town beauty, Leanna, he proposes to her after gentle nudging from his partner, Nia. Not long after, monsters attack the village while a hero is passing through. While assisting the hero in the village's defense, he becomes distracted and attacked by a monster. Luckily (or unluckily in this case perhaps) the hero's traveling companion, Erik takes the blow for Kain and falls injured. Accepting responsibility for this, Kain vows to pay off the debt.
While Kain is not as innocent or ignorant of the ways of the world as Leanna is, he too is blissfully unaware of the attentions this situation has brought on the pair, particularly from his own family.