After attending the memorial service for her husband's third death anniversary, Yui's sister and her brother-in-law Shun decide to stay at Yui's home for several days, combining the visit with a short holiday. Yui, who has long harbored secret feelings for Shun, can no longer suppress her desire. Her emotions finally erupt as she confesses, "I can't take it anymore—I want all of you." As family dynamics begin to shift, new and intense emotions start to emerge. A mature drama unfolds, blending warmth and tension in an intimate, forbidden tale.