The answer is: "OST song" refers to the song in the OST. OST referred to the original music in movies, TV series, and other film and television works, and the song part was the OST song. According to the search results, some OSTs of movies and television works included some songs, such as the theme song of the TV series OST of " A Thought of Passing Mountains," many of Zhou Shen's OST songs, and Yu Kewei's Top Ten Classic OSTs. Therefore, an OST song referred to the song part of the original music in a film or television work.
A novel is considered apt when it has a compelling plot that keeps the readers engaged. Good character development and a unique writing style also contribute to its aptness.
The OST lineup for the second season of Celebrating Years had already been announced. Among them, Li Jian sang the theme song " In My Lifetime," Zhou Shen sang the ending song " Excuse me," Liang Long, Liu Duanduan, Zhang Haowei, and Guo Zifan performed the promotional song " Aiya." These songs would bring more musical elements to the second season of " Celebrating Years," adding more emotions and atmosphere to the plot.
I'm not sure specifically what the 'apt 407 true story' is without more context. It could be a story related to an apartment numbered 407, perhaps something that happened there like a mystery, a personal experience, or an event in the building.
I'm not sure specifically what the 'apt 407 real story' is without more context. It could be a story related to apartment 407, perhaps something that happened there like a mystery, a personal experience of the tenant, or an event in the building where the apartment is located.