i was about the write merry marbling and then saw that u alr know that one.
go for "regas" it's really good. ( for me a lil bit more than merry marbling )
Green Flag Seme/Gong
https://www.mangago.zone/home/mangalist/2822037/
Here forest devoted semes-
https://www.mangago.zone/home/mangalist/2726706/
u can also read
star×fanboy
also one of my absolute fav is "one room TA" super hilarious and fun
Hii can someone recommend bl manhwas with green flag seme? Yaoi, shounen ai anything is fine and of the vibe is like merry marbling even better