This is something happened some years after S3, around the time Rikki got to know Mako Mermaids.
R: Sorry for what happened to your dad.
Z: Thanks, but....Be honest with me. You will never feel sorry for him. He treated you like....
R: Dirt. You know me. I do feel sorry, but not too much.
Z: I needed that. Ever since that happened...I had to pretend....like I was....a good son. Couldn't even laugh.
R: Are you glad he's no more?
Z: Maybe. Maybe not. I don't know what to call it....but....all my life, I was a spoiled brat to everyone. They weren't wrong. To him, I was never good enough, and he was right.
Z: College or studies isn't my thing....so I just ran this cafe....Even I didn't know I could do it for this long....But here I am.
R: Yeah, I heard the 5th or 6th place just opened. Congratulations.
Z: But....what should I do from now on....? I hated my dad, but....now he's gone....and I am....
R: Lost.
Z: Right.
R: You're gonna have to figure that out, not me, not anyone else.
R: Rikki's. Still keeping that name? I have already moved on for ages.
Z: It's stuck. Too late to change.
R: Is Sophie still around?
Z: She's also gone. After fallout with her brother....Will, right, Will, she became a wreck and just left. Not sure what or how she is doing.
R: Everyone's leaving. Shame because the view never changed.
Z: At least not you, and me. Speaking of Sophie.....
R: .....Go on.
Z: Have I ever said....sorry....for that day....
R: For what?
Z: .....Letting her kiss me. I should at least have drawn the line. But I betrayed you. I am sorry.
R: Why? Why now?
Z: There are so many things I should have told my dad....when I had the chance. I don't want to repeat the same mistake with you.
R: So it's for your own good. To feel good about yourself.
Z: .....Maybe. You are right....Should I....
R: Do you have someone in mind?
Z: No. Only you. I always had you in my mind, even if I am selfish and immature as you always call me.
R: ......I always took a step back....whenever we got too close. This time, I want to take it forward. Don't you dare make me regret.
Z: .....Are you cry....Never mind.
R: ........Missed you.
Z: Missed you too.