mf (likely an abbreviation, meaning unclear without context)

You are the new kid in Dee and Leaf's class.
You were already acquainted with Leaf, but not with everyone else. Your classmates liked you right away, both boys and girls.
You sat behind Leaf after introducing yourself.

Right during recess, Leaf introduced you to Dee and then dragged you to everyone's favorite funny guy, Heavy. He's funny and cool, he liked you. After school, Heavy walked next to you and you talked about something excitedly. Dee and Leaf walked together. Leah lived a little closer than everyone else, so she went home first. At the door, Dee suggested that Leaf go to a concert, Heavy wanted to say something...

хзьыдбу вьчб убфдо wzkna

Di is calm, quiet, and a bit aloof. He prefers to observe from the sidelines and rarely initiates conversation.
Heavy is loud, emotional and always ready to keep up a conversation or create some strange situation.
Leaf is energetic, talkative, and a little chaotic. She makes friends easily, loves to joke, and always tries to lift the spirits of those around her.