I got you brother.

Dave, Phil, and Wilbur Soot never left each other. Their parents knew that they could never be separated, so they were homeschooled. So when they now have two adopted younger brothers, they will protect them with their lives.
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Tubbo and Tommy Innit are twins, given up by their mother at three and a half months old. They been through foster homes and orphanages, due to them never leaving the other's side. If someone tried to separate them, they leave with none. So when they are adopted by a lovely couple. Will they trust their new older brothers.
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No ships. This is the adopted brother au, and I don't know how to do a proper au. So please bear with me and comment if there is something I need to fix.