sorry i only remember similar situations of those in these manhwas but I am pretty sure its none of them but might as well try!
https://www.mangago.zone/read-manga/secret_alliance/
https://www.mangago.zone/read-manga/nekama_punch/
Netkama punch mentioned ((٩(´ᗨ`)۶))
binge read it in a day… i’m so sadthe newest chapter def made me happy tho :D
Yess, it's secret alliance! Thank you for telling me
Oh lord I can't recall the title.. I read this manhwa a few years ago and the plot is smth like the bottom calls the top unnie cause when they first met he thought the top was a girl. Idk if it's unnie or noona but its a way to call an older woman in korea.