Freshly graduated from junior college, Suzu has decided to marry her boyfriend Shigeto. The couple plans to hold their wedding next spring, but before that, they visit Shigeto's only living relatives, the Kudo family. Since Shigeto's parents have passed away, he deeply respects the Kudo family as if they were his own father. However, in the region where the Kudo family resides, there remains a disturbing tradition in which all male relatives collectively 'taste' any woman who becomes a lover or bride to one of the family's men. The Kudos, noticing Suzu's innocent appearance, begin luring her one after another into various compromising situations. Among their schemes is a particularly cruel plot targeting Suzu's affectionate and dependent nature. The story unfolds as the seemingly naive girl is gradually drawn into the dark and twisted customs of this family.