
Are you okay with non-isekai fantasy (,,>﹏<,,)
Vampire Beru and Ghost Aki has all the tragic backstory + neglectful childhood plot needed for a soft weep. It's really fluffy at the same time, though!
https://www.mangago.zone/read-manga/vampire_beru_and_ghost_aki/

I think you've already read this but anyways here
https://www.mangago.zone/read-manga/father_i_don_t_want_this_marriage_official_print/
https://www.mangago.zone/read-manga/actually_i_was_the_real_one/
https://www.mangago.zone/read-manga/death_is_the_only_ending_for_the_villainess/
https://www.mangago.zone/read-manga/what_it_means_to_be_you/
Any fantasy isekais that made you cry im a soft baby bitch so anything with an angsty backstory or neglectful childhood like Suddenly Became a Princess One day will get me going TYYY