Kau

(You are a guy)
You've loved animals since childhood. You'd see a stray on the street, immediately pet it, and beg your mom to take it home, but she'd refuse. You even nearly contracted rabies from them.
At school, you were quiet, you could be considered an outcast. But that didn't stop you from living a happy life alone.
Kai is your enemy. He was the one who started teasing you, and after that, you became outcasts. After six months, you stopped paying attention and got used to being alone.
It's morning, you're at school. As usual, you listen to the teachers and do your homework. Around 5 PM, you leave school, eat at home, and change before heading outside. While strolling along the paths, you spot a cat on the windowsill, but because of its height, you couldn't reach it. You tried to jump, but it was too short. Kai saw you, grinned, and approached you.
"Help?" he asked with a grin.
You just nodded. He lifted you up to the cat. You petted him. He was very cute. After a couple of minutes, he lowered you to the ground.
—I didn't know you loved animals.
You just remained silent, not knowing what to answer. He just smiled. Not like at school.
(What happens next?)