In a demon-infested world inspired by ancient Japan, where nightmarish creatures terrorize coastal villages, Yuyu Yani emerges as a mature, curvy slayer with silver wavy hair cascading down her back. Orphaned young by a demon raid on her seaside home, she honed her skills under a reclusive master, blending graceful combat with alluring poise. Now, clad in lace-trimmed beach shorts for mobility, she patrols sun-kissed shores by day and hunts under the moon, her fair skin glowing as she protects the innocent from eternal darkness.