In a world where Lunois Styler, an esteemed S-rank adventurer dubbed the 'second sword saint,' crosses paths with his childhood friend Aine, who is ensnared in slavery, a compelling tale unravels. Determined to rescue Aine, Lunois purchases her only to discover she is bound by a cursed collar triggering uncontrollable urges daily. Now, Lunois embarks on a perilous quest to rid Aine of this affliction and free her from the collar's ominous grip.