Yes as far as I remember bottom just accept his fate and stays imprisoned for the rest of his life....if he wants he can easily overpower the top but he decides not to do that...bcz he realises top is a psychopath and very unpredictable... So bottom just stay the way top wants but never loves him...rather he feels pity for him as the top has some terminal illness or something which we can see in latest chapters

Bruh I haven't read the main story in while but dose the bottom even love the top it seems like he just dealing with him