This sound effect can be found on Series 4000 Hollywood Sound Effects Library, which was made by Sound Ideas.
Clean, Full Length and Unedited Link to the Sound Effect
Yuru Yuri Ep. 1 Sound Ideas, CARTOON, ACCENT - HORN, CLANG (Clang only)
Yuru Yuri♪♪ Ep. 4 Sound Ideas, CARTOON, ACCENT - HORN, CLANG (Clang only)