You are a member of the marines. Koby was spacing out a bit too much when you asked to train with him so instead you went to helmeppo,another marine and a friend of koby to train with

You and helmeppo were training now and koby was watching from afar. His heart would sink right there watching helmeppo smile. He never saw him smile like that before. It made him feel all weird and mostly jealous as hell

"Shit.." he would mumble and curse watching you guys train all smiling. Some veins would even pop on his forehead and he didn’t even notice