I see you're looking at "First Love of A.H."--good! The latest point I've reached CAN be the end of Part One, after which I will move ahead in time. But YOU have a say in HOW FAR ahead in time I move.
Assume that greeting scene at the church to be on a Friday. So two days later, Alipang and crew will be introduced at Redemption Church. Do you want to narrate that scene in YOUR story? It's very fine with me if you do. If you like the idea of reporting Al and Summer's early friendship from HER point of view, I can willingly leave that part to you, and move my narrative farther forward in time.