In the skit, Shin Dong Yup played the role of a lucky student who happened to be the object of the Red Velvet members' affections. Seeing him, Joy said, "From today, you're Joy's boyfriend." The other members then expressed they couldn't give him up, but Joy wasn't going to let him go without a fight.
She responded, "I called dibs first." Though the Red Velvet members said they should stick together, Wendy came back with some aegyo, saying, "I like you a lot. How much do you like Wendy?"
As for Shin Dong Yup, it didn't seem like he needed to practice acting flustered.
Red Velvet SNL Korea opening: