hello,The author yuxiu has a full video walkthrough of the fight with Leviathan on their Bilibili account,but it is Chinese,
here is the website link:
【城堡与莫梭提斯】海神战全选项剧情_哔哩哔哩bilibili_剧情
可以尝试在微博cue一下
真的太甜了……感觉这种用爱发电的优秀作品可以推给剑大亲自品鉴hh