https://www.mangago.me/read-manga/tutoring_my_gangster_best_friend/
https://www.mangago.me/read-manga/ai_ga_omoi_kishi_koushaku_wa_tsuihou_reijou_no_subete_wo_ubai_tsukushitai/
https://www.mangago.me/read-manga/tensei_shitara_maou_sama_ni_dekiai_saremashita/
https://www.mangago.me/read-manga/yoake_wo_kou_kemonotachi/
https://www.mangago.me/read-manga/ghostly_sex/
https://www.mangago.me/read-manga/at_the_end_of_the_hidden_greenery/
https://www.mangago.me/read-manga/i_m_trapped_with_the_male_leads_who_hate_me/
https://www.mangago.me/read-manga/how_about_cosmic_horror_diva_scans/
https://www.mangago.me/read-manga/a_kind_goblin_s_bird/

Any good straight smut story that actually has a plot??