I’m sad I can’t find the second one i remember it was close in style but found out it was another artist
https://www.mangago.me/read-manga/hachishaku_sama_cuntboy_kyousei_tanetsuke/
I have one and it's much cuter tho: https://www.mangago.me/read-manga/a_story_about_a_non_human_and_a_human_who_wants_to_date_a_non_human_blackflaghunter/

I’ve seen two other stories with this creature (different mc) and the same plot but i keep getting possessed to read it