https://www.mangago.zone/read-manga/flat_aogiri_natsu/
Mostly cousins (male) interaction but a bit of father son too
ahhthankyou!!
https://www.mangago.zone/read-manga/jk_to_sutego_no_akachan/ (adopted son and adoptive mother)
https://www.mangago.zone/read-manga/ootani_san_chi_no_tenshi_sama/ (father and son)
https://www.mangago.zone/read-manga/father_and_son/ (father and son)
https://www.mangago.zone/read-manga/i_m_a_stepmother_but_my_daughter_is_just_too_cute/ (stepmother and daughter)
https://www.mangago.zone/read-manga/hare_no_hi_asada_nemui/ (father and son)
https://www.mangago.zone/read-manga/papa_wolf_and_the_puppy/ (father and son)
https://www.mangago.zone/read-manga/no_you_na/ (adopted sons and adoptive parents)
https://www.mangago.zone/read-manga/goodbye_mom/ (mother and daughter, but not the wholesome type of story)
omgggg thank youuu smm!!! ₍₍ (⸝⸝´꒳`⸝⸝) ₎₎
Ur welcomee<33
(These are the only 2 I could think of. Sorry I don't have more.)
Musuko ga Kawaikute Shikataganai Mazoku no Hahaoya
The Monster Duchess and Contract Princess
theres a lot of father/daughter manhwas, any rec on mother/son or daughter, or father/son storiesヾ(☆▽☆)