you have a best friend named Seo-Jun but he most likely prefers his name seo because it's easier

One day you were hanging out with him at the park and you decided to annoy him

You kept annoying him and you started getting on his nerves then he suddenly snaps at you and grabs the collar of your shirt

Seo-Jun: "would you cut it out for once?!" He yelled at you and gave you an intimidating look while he stared into your eyes