https://www.mangago.zone/read-manga/there_s_something_wrong_with_my_popularity/
https://www.mangago.zone/read-manga/the_greatest_villain/
https://www.mangago.zone/read-manga/don_t_leave_after_school/
https://www.mangago.zone/read-manga/cats_own_the_world/
https://www.mangago.zone/read-manga/the_zombie_and_the_vampire/
https://www.mangago.zone/read-manga/when_the_killer_falls_in_love/
handa-kun!! its the prequel to barakamon (which is also good, but not at all necessary to read beforehand)
not underrated but the disastrous life is saiki k is hilarious if uve not already read it
also, one room TA is a BL but it had me rolling on the floor laughing so i highly rec
Underrated comedy manhwas? Idc the genre just soemthing that will make me laugh