In the quiet countryside, young miko Suzuna continues her training for an important upcoming rite while residing in her family’s spacious mansion. The arrival of the man chosen to be her husband brings unwelcome tension to her daily life and disrupts the household’s usual calm. As evening shadows lengthen, faint signs of disturbance appear throughout the estate, suggesting unseen influences at work. A subtle yet unsettling presence begins to affect those inside, leaving the inhabitants wary of what may lie ahead.