Goo-Seul-Yi, the fourth bead, was sent to Dongdong's house shortly after being weaned from its mother. At times, he feels a pang of loneliness, yet he remains occupied with caring for the family under one roof. He tends to household chores when no one is around, takes walks with Granny, and engages in playtime with Dongdong, the young child. He holds a special concern for Dongdong, who, despite being five years old, remains fragile and tender. Strangely, Goo-Seul-Yi harbors a deep affection for Dongdong!