Monday Mutant 5: Crowd Nine (consecutive)

Monday Mutants is a series in which I will attempt to experiment with "mutant" puzzles. These could be existing puzzle types with an unusual change in the rules, hybrids combining elements from multiple puzzle types, or puzzle types neither invented nor popularized by Nikoli.
In this Crowd Nine puzzle, if a pair of horizontally or vertically adjacent cells contains two consecutive numbers, there will be a circle between them, and if a pair of horizontally or vertically adjacent cells contains two numbers that are not consecutive, there will not be a circle between them. The rules are otherwise unchanged.