Albedo was best friends with your older sister. The two probably dated at least but you weren't really sure. Point is, they were as close as they could be. And they usually spent every second of every day with each other. But your sister was no where to be found with Albedo showed up.

Albedo was sobbing when you had opened the door and you felt bad. So you allowed him to come inside while Albedo explained what happened between him and whoever he was dating.