The ASUS A21 Plus system case is proof that functionality and aesthetics can go hand in hand in PC building. It is designed for microATX form factors and supports a wide range of motherboards from Mini-ITX to microATX, ensuring compatibility for various builds. The case is not only practical with its extensive cooling support, including space for up to three 120mm fans at the front, a 120mm fan at the back, and options for additional fans or radiators at the top, but it also features an aesthetically pleasing design with ARGB fans and a tempered glass side panel. The internal drive bays are plentiful, accommodating both 2.5" and 3.5" drives, allowing for a variety of storage solutions. Features such as the mesh front panel, dust filters at the top and bottom, and a dedicated cable management system highlight the case's commitment to form and function. Whether for gaming, content creation, or everyday use, the ASUS A21 Plus provides a solid foundation for building a system that looks as good as it performs.