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.
The OST lineup of " Celebrating the Second Season " included Li Jian, Zhou Shen, Liang Long, Liu Duanduan, Zhang Haowei, and Guo Zifan. They sang songs such as "In My Lifetime,""Excuse Me," and "Aiya." These songs were meant to continue the story of " Celebrating Years " with a melody and bring a new chapter to the audience. " The Second Season of Celebrating the Year " was an ancient drama adapted from Maoni's novel of the same name. It was starred by Zhang Ruoyun, Li Qin, and many other stars. The second season started filming on November 3, 2022, and was announced to be completed on October 17, 2023. It was aired on CCTV-8's primetime slot on May 16, 2024.
Often, in these fanfictions, Eren develops more empathy. He starts to really understand Mikasa's feelings. For example, he might realize how much his actions impact her and become more cautious. He becomes more of a protector instead of just a fighter.
Mikasa has always deeply loved Eren. Her love for him is shown through her constant protection. From their childhood days, Mikasa has been by Eren's side, ready to fight for him. Eren, in his own way, also holds a special place for Mikasa in his heart. Their relationship is complex and filled with unspoken emotions, especially in the face of the many challenges and battles they encounter together in the world full of Titans.