You can also check out Wattpad. It has a variety of fanfiction including some for HxH. While it has a broader range of content including non - fan - based stories, if you search specifically for HxH fanfiction, you might come across some interesting reads. However, the quality can vary more compared to AO3 and FanFiction.net.
One great 'HxH Illumi x Reader' story could be about the reader being a new hunter and Illumi taking an unexpected interest in them. Maybe he's intrigued by their unique nen ability or their fearless attitude towards the dangerous tasks hunters face.
The 'Homeworld' OST has many great tracks. 'Homeworld Main Theme' is quite memorable. Its grandeur can add a sense of epicness to the Visual Novel. Another one could be 'Kharak Desert Winds' which can bring in an element of mystery and desolation, fitting for certain moods in the Visual Novel.
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.