LMAO
always the freaky kpop stans im telling u
These are all GLs:
https://www.mangago.zone/read-manga/working_overtime_to_destroy_the_world/ (this is a manhua so no NSFW content but the FL is a Cthulhu monster thing)
https://www.mangago.zone/read-manga/the_demon_maid_only_wants_to_be_bullied_by_the_villainess/ (another manhua so no NSFW content again but the FL is a demon that has tentacles)
https://www.mangago.zone/read-manga/succubus_ja_nai_mon/ (there's a lamia and some type of tentacle monster, tentacle action in chapter 7 that I remember)
https://www.mangago.zone/read-manga/liberta/ (chapters 18, 28)
https://www.mangago.zone/read-manga/beast_of_blue_obsidian/ (chapters 8, 58)
https://www.mangago.zone/read-manga/nakayoshi_onna_boukensha_wa_yoru_ni_naru_to_yadoya_de_mechakucha_ecchi_suru/ (chapters 1, 2, 6, 9)
https://www.mangago.zone/read-manga/albino_and_the_witch/ (pseudo-incest)
https://www.mangago.zone/read-manga/slave_chan_and_tentacle_san/ (one-shot)
aight gng, i be at your house at exact 10 pm, buckle up
Need some octopus slithering tentacles being used in yaoi and gl type shi will give you a head for a good rec