Ichika Naruse is the young son of single father Keiichi Naruse, living with him and interacting regularly with their college student housekeeper, Kouya Asumi. Ichika visibly enjoys Kouya's cooking, showing enthusiasm during meals. He displays typical preschooler behavior, bouncing home energetically to announce his arrival. His daily experiences at preschool become topics for family conversation, especially when his father asks about his day over dinner. Ichika favors bear-themed pajamas and grows sleepy at bedtime. His father encourages him to eat vegetables during meals, providing parental guidance. Ichika has formed a positive bond with Kouya, a liking his father notes, which influences household dynamics and contributes to Kouya's continued presence.