A poster of Tiny Times 4 [File photo]

Along with the box office success of the domestic romance Tiny Times 4, its theme song "Time Boils the Rain" has also showed overwhelming oomph among fans of the series.

With the lyrics written by writer-turned-film director Guo Jingming, the song's melody was composed by Liu Dajiang.

However, critics in the music industry have recently pointed out the theme song is suspected of plagiarism.

They argued "Time Boils the Rain" is similar to a song released in Singapore by singer Joi Chua, in his 2006 album Waiting For A Sunny Day.

Guo Jingming says he is only responsible for the lyrics.

The recent controversy which arose from this Tiny Times Series theme song has also grabbed public attention back to music copyright infringement issues.