I'm assuming you're asking for tropes where one teases the other and the other gets annoyed and denies feelings but also kinda likes him, the manhwas I'm recommending aren't exactly like this but they do kinda follow this trope at some point, basically it's that both aren't lovey dovey happy couple types but more of push and pull
Monday's Saviour
https://www.mangago.zone/read-manga/monday_saviour/
Blaze out
https://www.mangago.zone/read-manga/blaze_out/
Dead man switch
https://www.mangago.zone/read-manga/dead_man_switch/
Sunday's consolation
https://www.mangago.zone/read-manga/sunday_s_consolation/
Dreadful Night
https://www.mangago.zone/read-manga/dreadful_night/
Payback
https://www.mangago.zone/read-manga/payback_1/
Park Hanhoo's Manager
https://www.mangago.zone/read-manga/park_hanhoo_s_manager/
does any one now if there is a yaoi that has the same relationship dynamic as the second couple of 19 days.