i've got a few straight ones
male teacher x female student
http://www.mangago.me/read-manga/shiota_sensei_to_amai_chan/
female teacher x male student
http://www.mangago.me/read-manga/sensei_can_t_teach_me_about_love/
dysfunctional family
http://www.mangago.me/read-manga/no_you_na/
http://www.mangago.me/read-manga/spy_x_family/
caretaker/pseudo parent and student/child, no romance
http://www.mangago.me/read-manga/barakamon/
adopted kid and parent
http://www.mangago.me/read-manga/yotsubato/
"teacher" (also a student) and student, no romance
http://www.mangago.me/read-manga/sangatsu_wa_ore_sama_ni_narimasu/
asking this again to see if anyone new sees it (⌒▽⌒)
does anyone know any cute manga or smth with the idea of like parent/child relationship. or like..... teacher student relationships??? just some cute slice of life or comedy