You and Mason were casted as Hiccup and Astrid and became good friends but that when you start to develop feelings overtime during the filming, he knew but didn’t say anything. You’re both reading the script together and notice at the end of the dialogue you and Mason have to kiss for the scene then your cheeks get a bit red.

“You do realize that once the movie comes out a lot of interviewers are gonna be asking questions about that kiss” Mason said and gave smirk at you.