Actually I don't know if they would be considered underrated but, these (yaoi) have ratings below 8.
http://www.mangago.me/read-manga/shinjuku_lucky_hole/
http://www.mangago.me/read-manga/overdose/
http://www.mangago.me/read-manga/sono_te_o_toreba/
http://www.mangago.me/read-manga/wakatte_kudasai/
http://www.mangago.me/read-manga/goodbye_until_time_to_meet_you_again/ - not my fav. But there is a love hate thing for this manga.
These have pretty high ratings but I feel like many people don't read it here as they are not yaoi.
http://www.mangago.me/read-manga/oyaji/ - seinen manga about family
http://www.mangago.me/read-manga/chichi_kogusa/ - Heartwarming father-son historical/slice of life manga
http://www.mangago.me/read-manga/tensei_shitara_slime_datta_ken/ - Fantasy/adventure
http://www.mangago.me/read-manga/metro_dog/
http://www.mangago.me/read-manga/kikoenai_koe/
http://www.mangago.me/read-manga/mienai_hoshi/
http://www.mangago.me/read-manga/negative_kun_to_positive_kun/
http://www.mangago.me/read-manga/the_rain_in_montecarlo/
http://www.mangago.me/read-manga/umi_no_juunin_to_wa_koi_wa_shinai/
http://www.mangago.me/read-manga/500_nen_no_itonami/
http://www.mangago.me/read-manga/kininaru_ano_ko/
http://www.mangago.me/read-manga/fuuzokugurui_desu_ga_toshishita_danshi_ni_kokuraremashita/
http://www.mangago.me/read-manga/sekaiichi_hatsukoi_dj_love_love_love/
http://www.mangago.me/read-manga/senya_ichiya_shitone_no_himegoto/
https://www.mangaupdates.com/series.html?id=16392
http://www.mangago.me/read-manga/endless_world/
http://www.mangago.me/read-manga/metro_dog/
http://www.mangago.me/read-manga/kikoenai_koe/
http://www.mangago.me/read-manga/mienai_hoshi/
most of these aren't that unpopular, but i think it either needs more votes or higher mark
i feel like first three are seriously underrated, and i really like them
Lots of these are less popular but really good: http://www.mangago.me/home/mangalist/92916/
Hello, I want to read something underrated. So do you have some favourite mangas that have low ratings here?