One day, the younger brother was left speechless when his older brother returned home to announce their marriage, bringing with him his new wife, Sumire. Her exquisite, voluptuous figure—rarely seen in their hometown—immediately stirred intense excitement within him. Despite trying to hide it, his lustful gaze lingered uncontrollably. Even the quiet, reserved father-in-law couldn't take his eyes off Sumire's alluring body, staring at her intently and unable to look away.