Recs

Try the author nojiro guri’s work. Just search his name and all of his work will come up. I love all of his manga, you will fall in love with every story

Also
Tamayura
Life no senjou bokura
Revival blue
Contrast
Sayonara bokura
Reset
Neon sign amber

It's not all short manga, but I have a lot in this list:

https://www.mangago.zone/home/mangalist/2723961/

ao no tsubomi
okusama wa alpha
boku no high spec kareshi sama

https://www.mangago.zone/read-manga/internet_love/
https://www.mangago.zone/read-manga/link_and_ring/
https://www.mangago.zone/read-manga/family_now_and_forever/
https://www.mangago.zone/read-manga/sekai_de_ichiban_toui_koi/
https://www.mangago.zone/read-manga/haru_to_natsu_to_nacchan_to_aki_to_fuyu_to_boku/
https://www.mangago.zone/read-manga/chameleon_wa_tenohira_ni_koi_wo_suru/
https://www.mangago.zone/read-manga/shinyuu_no_dousei_shite_ni_un_to_iu_made/
https://www.mangago.zone/read-manga/ao_to_midori/
https://www.mangago.zone/read-manga/chiguhagu_na_kiss/
https://www.mangago.zone/read-manga/loss_time_ni_hanamuke_o/
https://www.mangago.zone/read-manga/snow_fairy/
https://www.mangago.zone/read-manga/konosaki_wa_futarikiride/
https://www.mangago.zone/read-manga/old_fashioned_cupcake/
https://www.mangago.zone/read-manga/living_with_him/
https://www.mangago.zone/read-manga/delivery_hug_therapy/
https://www.mangago.zone/read-manga/hidamari_no_orange/
https://www.mangago.zone/read-manga/awairo_emaki/
https://www.mangago.zone/read-manga/kimi_to_nara_koi_wo_shite_mite_mo/
https://www.mangago.zone/read-manga/hayama_sensei_no_dakimakura/
https://www.mangago.zone/read-manga/motoyan_papa_to_hitsuji_sensei_yotsuba/
https://www.mangago.zone/read-manga/ugetsudou_antique/
https://www.mangago.zone/read-manga/itooshiki_hibi/
https://www.mangago.zone/read-manga/toumei_na_ai_no_utsuwa/
https://www.mangago.zone/read-manga/amagami_wo_kimi_ni/
https://www.mangago.zone/read-manga/the_omega_takes_a_husband/
https://www.mangago.zone/read-manga/ookami_sama_no_koiwazurai/
https://www.mangago.zone/read-manga/mitsuya_sensei_no_keikakuteki_na_edzuke/
https://www.mangago.zone/read-manga/shiawase_gohan_maki_to_hanazawa/
https://www.mangago.zone/read-manga/enishi_majiwaru_haguremono/
https://www.mangago.zone/read-manga/muchuu_ni_naruu_yo/
https://www.mangago.zone/read-manga/country_diary/
https://www.mangago.zone/read-manga/tabun_korekara_ai_no_hibi/

Have you read any of these? (≧∀≦)