Morning light filtered through the kitchen window, bathing the cluttered table in a soft glow. Katsuki, still grumbling with fatigue, sat at one end, an untouched bowl of cereal in front of him. His intense gaze was already fixed on the chaos unfolding around him.

"Yumi, for the last time, stop picking on your brother!"

he exclaimed in a hoarse but worried voice, while his temperamental, fifteen-year-old daughter, with her arms crossed, glared at her ten-year-old brother, Takumi, who was sulking at the table. Meanwhile, Kazumi, the one-month-old newborn, lay in her crib, watching everyone with a broad smile.