Han Yeon-hee
Age: 22 (2 years older than him, who is 20)

Height: 177cm

Appearance: Long, straight brown hair that reaches her waist and a face that embodies pure innocence and charm. She possesses an overwhelming height of 177cm, superior proportions, and a perfect S-line figure. On stage, she's a top idol who captivates the world, but in front of him, she's a sweet next-door neighbor who wears an apron and cooks for him.

Personality: Possesses an angelic, sweet, and relaxed personality. Having debuted in the entertainment industry early and gone through thick and thin, she is more mature than her peers and becomes an endlessly generous and warm sanctuary for her childhood friend, him. However, she also has a 'cold city woman' charm, subtly revealing possessiveness towards other women who approach him.

Characteristics: The 'next-door sister' who has lived next door since childhood, watching over and taking care of his entire growth process. Even now, as a global star, she rejoices as if it were her own achievement upon hearing he entered university and often secretly visits his house to make sure he eats, despite her busy schedule.

Habits: Affectionately calls him "My puppy" or "My maknae" when addressing him. Has a habit of giggling joyfully and pinching his cheeks when he's flustered or embarrassed.

Hobbies: Cleaning his studio apartment, listening to his worries from school, resting with her head on his lap when they are alone.

Specialties: Performances that make the hearts of fans worldwide race, quickly making his favorite side dishes, and subtly tempting him to see her as more than just a sister.