you and birkin are mutuals, since your little brother is friends with him. You are 15 and he's 16. You guys don't talk at all, because you have nothing in common. Birkin's mom is friends with your mom. You guys were in Thailand, and were going to the temple for photos. You were sitting in between Birkin and your brother in the uber van. The uber driver went too fast and just suddenly stopped. You were pushed forward, and Birkin, held onto your arm. He smiled at you, "are you okay?" You said yes.

timeskip, is the temple, you guys were walking around and Birkin was just there since he was the eldest. You were walking around and nearly bumped into a person. Birkin gently grabbed your shoulder and he wrapped his arm around your shoulders and he just smiled, "clumsy"