some of them are more nippled focus manga rather than the seme being solely obsessed with it
https://www.mangago.me/read-manga/tongari_aikouka/
https://www.mangago.me/read-manga/usagi_chan_doshikori_moushiagemasu/
https://www.mangago.me/read-manga/oppai_wrestling/
https://www.mangago.me/read-manga/chiku_bingo/
https://www.mangago.me/read-manga/chikubi_ga_yowakute_ikirenai/
https://www.mangago.me/read-manga/ore_no_kanbotsu_chikubi_ga_senpai_no_shitapi_de_tachimashita/
https://www.mangago.me/read-manga/go_houbi_chikubi/
https://www.mangago.me/read-manga/honto_yajuu/
https://www.mangago.me/read-manga/momichupa_oppabu_osu_time/

Reccommend me stories where the seme obsess with uke's nipple so hard ლ(´ڡ`ლ)