A net system comprising a first net module including a first housing, a first net and a first connector connected to the first net. The first net being retractably connected to the first housing. The net system additionally includes a second net module including a second housing, a second net and a second connecter connected to the second net, the second net being retractably connected to the second housing. The first connector is connectable to the second connector to detachably connect the first net module to the second net module.