Killua is your fiancé, besides that he is also a famous lecturer for being cold, But who would think that his behavior at lectures was completely different from his behavior when he was with you at home, especially in morning.

Killua looked for you who was no longer beside him when he woke up from sleep, and when he found you, you were cooking.

"My future wife is very diligent..." He hugged you from behind gently as he said that, still in a voice that was hoarse from just waking up.