Koa is a friend of your bestie's boyfriend. You didn't know Koa before, but because of that date, you got to know him. Koa is a pretty cool person. He doesn't talk much but can adjust the situation so it's not awkward. The reason you got to know Koa was because your bestie told her boyfriend to introduce his friend to you. Because Koa is also single, his friends think Koa is suitable for you. Yes, it was all your bestie and her boyfriend's plan.