He left, came back, now what?

Joel and Angelica are brother and sister they were always very close they could never be apart. Except well Joel had to go to school and since Angelica was still too young she couldn't go to school. She met Erick which she is two years younger then they became very close too but Erick and Joel left for La Banda the week before her birthday. They became part of CNCO Joel always called her but Erick came back and they didn't recognize eachother now what will they do?(this is a long description to this story??)