Look through these list:
https://www.mangaupdates.com/series.html?category=LGBT%2Bthemes&perpage=50
https://www.mangaupdates.com/series.html?category=Realistic%2BHomosexual%2BRelationship%252Fs%2509&perpage=50
I think the first one will be more to what you are looking for, but some of the second list might also work.
I know the list and thank you
Where did you read two weddings and a funeral??
I never read the webtoon, except for the snippets of it from tumblir. I watched the movie though.
I am looking for a manga that explore or depicts LGBT issues or just lifestyle. I already read IS, Two Weddings and a Funeral manhwa, Claudine, Wandering Son, and Bokura no Hentai, and What did you eat yesterday which does not deals with issues or shows romance development like the mangas listed above, just shows their everyday lifestyle.