eugene :3

This one was really close to switching: https://www.mangago.zone/read-manga/love_me_dramatically/

https://www.mangago.zone/read-manga/neko_x_neko/
https://www.mangago.zone/read-manga/outotsu_morning_love/
https://www.mangago.zone/read-manga/a_tough_alpha_wants_to_be_loved_cornered_by_a_young_omega/

https://www.mangago.zone/read-manga/pygmalion_1/ i love this one

https://www.mangago.zone/read-manga/neko_x_neko/
Also Koi Tsunagi (but it's only translated in spanish)

Sharing stories that I liked and where you see an actual switch of top becoming bottom:

https://www.mangago.zone/read-manga/neko_x_neko/ - more popular story of switch

https://www.mangago.zone/read-manga/playtime_with_hakdo/

https://www.mangago.zone/read-manga/outotsu_morning_love/ - anthology one-shots

https://www.mangago.zone/read-manga/like_a_tidal_wave_from_pheromone_shower/

https://www.mangago.zone/read-manga/sayonara_okaeri_itoshisa_ni_koi_ni_tsuite_oshietekurenai_ka/

https://www.mangago.zone/read-manga/wagging_the_tail/

https://www.mangago.zone/read-manga/why_is_it_you/ - if I recall right, the switch is at the end.

https://www.mangago.zone/read-manga/dark_heaven/

https://www.mangago.zone/read-manga/thirst_1/

https://www.mangago.zone/read-manga/zero_at_the_bone/

https://www.mangago.zone/read-manga/kantoku_nekona_ore_wa_dame_desu_ka/
https://www.mangago.zone/read-manga/boy_boy_idol_collection/uu/to_chapter-2/pg-1/ - 2nd story from anthology

https://www.mangago.zone/read-manga/koi_suru_bicchi_no_toro_ana_jijou/ - again, tail-end is where switch at

https://www.mangago.zone/read-manga/happy_shitty_life/

https://www.mangago.zone/home/mangalist/897443/?filter=&page=1

one of the best: https://www.mangago.zone/read-
manga/pygmalion_1/'

the sex scenes start in the side chapters

sorry the link didnt paste right https://www.mangago.zone/read-manga/pygmalion_1/

https://www.mangago.zone/read-manga/your_memes_are_better_looking_than_you/ https://www.mangago.zone/read-manga/ienekonora_wa_oogataken_ga_nigate/ https://www.mangago.zone/read-manga/ikemen_douryou_ga_ore_no_juukakin_fan_deshita/ https://www.mangago.zone/read-manga/kimi_to_no_dogfight/

this one is really good so far :D
https://www.mangago.zone/read-manga/nekama_punch/

https://www.mangago.zone/home/mangalist/2416997/

https://www.mangago.zone/read-manga/candy_man/