Takayanagi just be happy that Ogura sensei didn't had any scandalous kinks, i think that's a relief on its own, imagine if it was some extreme freaky stuff
Knowing that his porn stash is in good hands will allow his spirit to rest in peace
All jokes aside, that autograph looked important tho, it was framed and all, you probably should have it valuated before assuming that it is trash, low key, and this may frustrate them, but the uncensored vintage foreign porn photo album is probably the thing that would get the biggest price evaluation out of that library
Also also, books just by virtue of being made of paper, can be donated or sold to recycling plants, but even before considering those drastic options, there are second hand bookstores, and public libraries that will accept the donation, or straight out buy the books, but just plain trashing it feels wrong specially considering that Ogura probably has some historic stuff in there
I know that there's the pressure of how oppressive Ogura's belongings are with how they pretty much take over the house, but i feel they need to do this decluttering process in more than one visit, oh well at least they got a good cry out of it