http://www.mangago.me/read-manga/nee_sensei/ ?
but I guess you mean this https://www.mangaupdates.com/series.html?id=158346
seems its not translated yet. there is also a drama adaption
http://daisukitoku.com/2019/11/03/eiji-akaso-and-fumika-baba-star-in-nee-sensei-shiranaino/
it seems you can find till ep3 with eng. subtitles (searching with google)
Yes the later link. Shoujo manga. Not the yaoi one
Yes, currently watching the live action drama one so i want to read the manga first
Is there manga Nee sensei, shiranai no? Here? Cuz I've searching it but nowhere to be found. If there's not here, how to request this manga? Cuz currently I'm watching live acrion version of it ლ(´ڡ`ლ)