Faults

When Marin moves in next door to the Shabana siblings, at first they seemed destined to be enemies. Afterall, the demon siblings were rude, crude and insufferably jealous of anyone who did anything better than them. But after she's beaten brutally in a street fight, a brick is thrown through her window and shortly after all Hell breaks loose as poor Marin is entangled in her neighbors' criminal past with their former employer and crime lord, Muzan Kibutsuji, who seeks to wipe them out altogether.

This is a Slow burn crossover with multiple arcs and currently is 2 volumes. Volume 1 primarily follows Marin and Gyutaro volume 2 will be Akaza.