It could also be related to a prophecy or a pre - determined fate in the fanfic's plot. There might be some kind of dark prophecy that says Kawaki has to kill Naruto to prevent a greater evil. Or perhaps Kawaki is being controlled by an external force that has a vendetta against Naruto and uses Kawaki as a tool to carry out the murder.
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.
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.
One common theme is friendship. Writers often explore how Himawari and Kawaki, who come from different backgrounds, form a bond of friendship. Another theme is growth. They both grow as characters, learning from each other.
Kawaki makes his appearance in Boruto manga at a specific point, but I can't recall exactly. You might want to check the official manga sources for the precise chapter.
OST was the shortened form of original music, which referred to the music used in movies, TV series, games, and other media works. It included scores or songs from movies, as well as music from anime. OST was usually released in the form of an album for the audience to enjoy. It could be released as an independent piece of music and receive independent attention and recognition.
The OST of " Praying for Today " included a theme song called " Miracle." This song was sung by the JS group. They had once sung "Kill the Wolf" for the Legend of the Sword and Fairy. According to the comments of the netizens, this song displayed a pure Xianxia flavor as soon as it opened. In addition to the JS group, Zhou Shen, Shan Yichun, Yu Jiayun, and other singers also participated in the OST of this drama.