It all started when they first met.

In elementary school, she saw Kaito who's a year younger than her being bullied. She came and resqued him. Long story short, they became inseperable.

Wherever there's Meiko, there's Kaito. Meiko is always there protecting the crybaby Kaito. Meiko had always been his hero.

It's just like a twisted fairytale where a prince was saved by a princess.

"I wanna be stronger!" He said. "I wanna protect Mei-chan!"

"Kai-chan doesn't need to! Im really fine.."

"Yes you are..." He sighed.

"You're better than me in everything. Im just a little loser."

He pouted. Meiko stroked his back gently.

"Don't be like that!" She said.

"I'm sure, one day you'll change! You'll become a strong and independent man!" She tried to encourage him.

"Then..." he looked up, staring at Meiko's eyes.

"If i grow up into a strong, independent, and smart man, will Mei-chan marry me?"

"Sure! I'd like to stay with Kai-chan forever..."

"Me too! Me too! Im going to buy you the most beauuutiul ring in the universe!"

They laughed. Such an innocent promise.

Kaito still remembers it untill now. And he's going to make it happen. He glanced at his piggybank (which is totally childish, Meiko said) and smiled.

"Soon..." He whispered to himself.

"...im going to fullfill my promise."