Mika Kobayashi: What are you doing?
Daigo Kobayashi: This one. Here.
Mika Kobayashi: What?
Daigo Kobayashi: A stone letter.
Mika Kobayashi: Stone letter?
Daigo Kobayashi: Long ago, before writing, you'd send someone a stone that suited the way you were feeling. From its weight and touch, they'd know how you felt. From a smooth stone they might get that you were happy, or from a rough one that you were worried about them.
Mika Kobayashi: Thank you.
Daigo Kobayashi: What did you feel?
Mika Kobayashi: Not telling. That's a lovely story. Who told you?
Daigo Kobayashi: My dad.
Mika Kobayashi: You mean... that big rock?
Daigo Kobayashi: Yep. I got it from him.
Mika Kobayashi: I didn't know that.
Daigo Kobayashi: He said he'd send me one every year, but that's all I ever got. That jerk!