nah cuz ive been looking for the same love for sale is my personal fav and this one is cute too! https://www.mangago.zone/read-manga/tractor_full_of_love/
hopefully these kinda fit what you were asking for
https://www.mangago.zone/read-manga/saenai_oji_san_to_ore_sama_yankee_kun/,
https://www.mangago.zone/read-manga/all_about_lust/ (specifically the first couple,),
https://www.mangago.zone/read-manga/furachi_na_keiji_san/ (TW for this since the couple both become SA victims),
https://www.mangago.zone/read-manga/rabbits_ejaculate_in_3_seconds_mgs/
Here’s a few of my favs:)
https://www.mangago.zone/read-manga/moon_of_the_devil_world/
https://www.mangago.zone/read-manga/plaything/
https://www.mangago.zone/read-manga/gwanggong_industrial_complex_please_candy/
https://www.mangago.zone/read-manga/amaregulus_soldier_soother/
https://www.mangago.zone/read-manga/charming_scarface/(the author made two others with big bottom small top too)
Manga's where the bottom is bigger than the top please I've been looking for a while ╥﹏╥