
try "Rainbow city" (There is SA in chap 3, best to skip BUT I loved the dynamic and the relationship development is SO GOOD. They go from thinking each other is annoying to becoming absolutely obsessed as the story goes on. And ofc no actual smut scenes until MUCH MUCH LATER in season 3 which isnt here yet. ITS SO GOOD)
little mushroom
lovely allergen

https://www.mangago.zone/read-manga/my_id_is_gangnam_beauty/
https://www.mangago.zone/read-manga/seihantaina_kimi_to_boku/ (id argue they're like, the realest depiction of teenagers ive seen in a while)
https://www.mangago.zone/read-manga/there_s_something_wrong_with_my_popularity/ (kinda realistic. i'd say it's definitely more comedy in a light-hearted way, and the relationship dynamic is so funny and the characters' insecurities are well-developed without being too hard-hitting)
https://www.mangago.zone/read-manga/i_love_amy/ (this,,, honestly isn't super realistic, but if you're looking for chemistry and relationship development in multiple forms, it's probably this)
https://www.mangago.zone/read-manga/iki_dekinai_no_wa_kimi_no_sei/
https://www.mangago.zone/read-manga/is_it_a_fortune_or_is_it_a_woe/
https://www.mangago.zone/read-manga/revenge_wedding/ (most solid dislike-to-like relationship i've seen)
https://www.mangago.zone/read-manga/the_eve_festival/
https://www.mangago.zone/read-manga/meguro_to_akino_wa_kizukanai/ (their friendship is core for their dynamic to work) same with this one: https://www.mangago.zone/read-manga/tameshi_ni_komando_itte_mita/
https://www.mangago.zone/read-manga/this_witch_of_mine/
https://www.mangago.zone/read-manga/i_m_a_stepmother_but_my_daughter_is_just_too_cute/ healthiest relationship with pretty solid themes for both MC + ML
https://www.mangago.zone/read-manga/the_djinn/ this is like. actually kinda intense so idk if this is what you're looking for. it's also set in a fantasy setting, so while i think the characters' and their actions and feelings for each other are super realistic, this is NOT a realistic plot.
https://www.mangago.zone/read-manga/skip_to_loafer/
https://www.mangago.zone/read-manga/still_like_me/
https://www.mangago.zone/read-manga/equipoise/ (actually i only read like. the first couple chapters like YEARS ago so i cant actually vouch for this one LMAO)

Trust me this one is super good and realistic, there’s no rape or sa either!!!
- https://www.mangago.zone/read-manga/shangri_la_no_tori/

This one is so badly underrated. https://www.mangago.zone/read-manga/match_made_in_hell/ Please try it when you get the chance
I just want stories that are somewhat realistic with their relationships. I want to see actual love and chemistry, their feelings forming before anything else. Not just them having sex all the time. ╥﹏╥