i love this one so much - http://www.mangago.zone/read-manga/mystery_to_iunakare/
you might also like this one! - http://www.mangago.zone/read-manga/koko_wa_ima_kara_rinri_desu/
if you want a cute ongoing one to keep up with, Seeing Double has peeked my interest so you might like it too ! but if you want a wholesome completed one, Last Paradise is good as well ! if you enjoy smutty ones more, i would recommend Stigma or Walk on Water ! and if you're into psychological ones, i def recommend Warehouse or Black Mirror. not many of these are super underrated, but i think you should try them if u haven't already !
I just want to read good manga with a good unique plot who is underrated and unknown!!! Idk about genre