"Yuxi. You are my first friend. I think you will also be my most important friend."
"Kecha. Do you know? My dream is to build a blue house with a white roof! I really want to escape from my current home."
"Then can I live with you? You are lonely sometimes, right?"
"That means we have agreed that we will be lifelong friends? Can I think so?"
"Idiot. We've always been like this, it's never changed!"
Our vows to be lifelong friends are buried on the blue and white roof we promised.