Ultraman X: S1 E18 - Wataru's Romance Ultraman X

The cheers of his childhood friend, Nanako, help Wataru through a game of rugby. But when Nanako and Hayato seem to be getting closer, he's left in anguish. Then the Space Monster Cat Mu appears and Red King is struck by Dark Thunder Energy, causing a panic in the city! When X arrives to deal with the problem, Mu clings to him fondly! What is Mu after? And what will become of Wataru's love?