I don't think it's underrated but a friend recommended it to me and I liked it
https://www.mangago.me/read-manga/kimi_no_yoru_ni_fureru/
Some already have some attention but oh well (￣□￣」)
https://www.mangago.me/read-manga/life_senjou_no_bokura/
(Gut wrenching ending)
https://www.mangago.me/read-manga/boku_no_papa_to_papa_no_hanashi/
https://www.mangago.me/read-manga/until_i_meet_my_husband/
https://www.mangago.me/read-manga/takara_no_biidoro/
https://www.mangago.me/read-manga/the_last_step_on_the_way/
https://www.mangago.me/read-manga/fangs/
https://www.mangago.me/read-manga/itadakimasu_gochisou_sama/
https://www.mangago.me/read-manga/tameiki_no_haru_ni_koi_no_natsu/
Some of them might have some sensitive topics, but I'm not too sure what as It's been a while since I've read these sorry (╥_╥)
My first time back in sooo long! I’m so happy this question section is open again.
Someone pls rec me any b&w bl that you think deserves more attention!