https://www.mangago.zone/read-manga/itooshiki_hibi/
https://www.mangago.zone/read-manga/family_now_and_forever/
https://www.mangago.zone/read-manga/toumei_na_ai_no_utsuwa/
https://www.mangago.zone/read-manga/yuutousei_wa_unmei_no_akai_ito_ni_sakaraitai/
https://www.mangago.zone/read-manga/motoyan_papa_to_hitsuji_sensei_yotsuba/
https://www.mangago.zone/read-manga/sonokoi_jihanki_de_kaemasuka/
https://www.mangago.zone/read-manga/paint_love_and_the_colors_will_bloom/
https://www.mangago.zone/read-manga/country_diary/
https://www.mangago.zone/read-manga/amagami_wo_kimi_ni/
You could also look through or check out my list
https://www.mangago.zone/home/mangalist/2768506/?filter=&page=7
Need recs for short stories or oneshots that are fluffy and sweet