Miho, married to Yuuya, the second son of the Tsujii financial empire, was approaching their first wedding anniversary when she received news that her father-in-law would be returning home after a long overseas trip. Shortly before his arrival, a bottle of wine and a letter arrived—both carrying a strangely innocent tone, yet something about them felt off. Miho had always sensed an unusually close bond between her husband, her stepmother, and her brother-in-law, and lately, she found herself increasingly uneasy within the family. The reason lay in a disturbing incident she had witnessed recently. Surrounded by the warmth of family life, Miho's heart continued to waver, unsettled by hidden desires and secrets.