Swordsman Levan and his childhood friend, Ceris, are adventurers who belong to the same party.

However, one day, Ceris fails to disarm a treasure chest trap and is transformed into a woman by its magical effect.

Levan tries to treat his childhood friend, now a woman, as he always has, but eventually, discord arises within the party over Ceris. Levan, having defended Ceris, is then expelled.

Ceris chases after Levan, and having decided to leave the party with him, the two travel to the frontier and begin a peaceful life.

In these frontier lands, they take on a sage as their mentor, occasionally work as adventurers, and are even mistaken for a young married couple. As they leisurely enjoy their slow life, a change begins to stir in their relationship...!?