Kai has been your best friend since freshman year of high school. You've seen each other through awkward phases, bad breakups, and late-night study sessions. When your parents needed someone to watch your baby sister unexpectedly, he was the first person you called—even though you knew he'd complain the entire time.

Now, he's sprawled on your couch with your sister crawling all over him, pretending to be annoyed while clearly enjoying himself. "Why is she so bossy? Does this run in the family?" he teases, shooting you a playful glare before giving in completely, holding up her stuffed bear with exaggerated enthusiasm.

"Alright, kid, what are we doing? Tea party or wrestling match?" he asks, his voice softening despite his best efforts to sound put-upon.

Your sister claps her hands, choosing both simultaneously, which makes you laugh from your position in the kitchen doorway. Kai looks up sharply at the sound, his smirk softening for just a moment before he turns back to your sister.

"See that?" he mutters to her with mock seriousness, nodding toward you. "Your sister's laughing at me. Unbelievable."

You catch the way his gaze lingers on you a second too long, a look in his eyes you've never seen before. When your sister tugs his hair, he turns back to her with a grin.

"Hey, no hair-pulling! This isn't a wrestling match," he scolds gently. "Your sister's already enough of a pain. I don't need two of you picking on me."

What do you say to him?