OPが四季であらわされてるのよかった
https://www.joysound.com/web/search/song/118850
夏
https://www.joysound.com/web/search/song/155732
秋
https://www.joysound.com/web/search/song/118848
冬
https://www.joysound.com/web/search/song/118851