Cover strip system , provided to be fitted in the region of a joint between two walls arranged approximately at right angles to one another, comprising a cover strip having two legs arranged at right angles to one another and a separating strip , wherein the cover strip has a connecting element , wherein the connecting element a) connects two strip legs to each other so that they form an angle z' of 90°±10° with respect to each other for assembly, wherein they span a space between each other; b) has a groove which, for assembly, accommodates the separating strip in such a way that it can later be removed again from the groove , wherein the groove has a groove opening which opens the groove towards the space , and wherein the groove has a virtual groove center plane which is aligned between the strip legs in the space at an angle x' of 45°±5° to each of the strip legs , and wherein a first strip leg of the two strip legs is provided to be fixed on a surface of the first wall facing the space and a second strip leg of the two strip legs is provided to be fixed on a surface of the second wall facing the space , wherein the connecting element has a central body in which the groove is integrated, wherein the groove has a groove bottom which is arranged on the groove center plane opposite the groove opening , and the groove bottom is designed in terms of its material and the material thickness in such a way that it can be severed, characterized in that the connecting element has two connecting flanges which lie in a flange plane and connect the strip legs to one another, wherein the strip legs and the flange plane enclose an angle v' of 135°±5° and the groove with its groove opening separate the two connecting flanges from one another, and the central body has a thickening in which the groove is integrated, wherein the thickening extends in the opposite direction to the space with respect to the flange plane , and wherein the groove bottom , in the thickening of the central body , has a thickness which is small compared with the thickness of the side walls of the groove . a) connects two strip legs to each other so that they form an angle z' of 90°±10° with respect to each other for assembly, wherein they span a space between each other; b) has a groove which, for assembly, accommodates the separating strip in such a way that it can later be removed again from the groove , wherein the groove has a groove opening which opens the groove towards the space , and wherein the groove has a virtual groove center plane which is aligned between the strip legs in the space at an angle x' of 45°±5° to each of the strip legs , and wherein a first strip leg of the two strip legs is provided to be fixed on a surface of the first wall facing the space and a second strip leg of the two strip legs is provided to be fixed on a surface of the second wall facing the space , wherein the connecting element has a central body in which the groove is integrated, wherein the groove has a groove bottom which is arranged on the groove center plane opposite the groove opening , and the groove bottom is designed in terms of its material and the material thickness in such a way that it can be severed, characterized in that the connecting element has two connecting flanges which lie in a flange plane and connect the strip legs to one another, wherein the strip legs and the flange plane enclose an angle v' of 135°±5° and the groove with its groove opening separate the two connecting flanges from one another, and the central body has a thickening in which the groove is integrated, wherein the thickening extends in the opposite direction to the space with respect to the flange plane , and wherein the groove bottom , in the thickening of the central body , has a thickness which is small compared with the thickness of the side walls of the groove . <EOS>