You have to read these mangas. They are fluffy, great story and chemistry and very much underrated. This is my personal list
http://www.mangago.zone/home/mangalist/699457/
here are some of my faves
http://www.mangago.zone/home/mangalist/776772/
http://www.mangago.zone/read-manga/nobody_knows/
http://www.mangago.zone/read-manga/tokyo_shinjuu_totempole/
http://www.mangago.zone/read-manga/one_piece_dj_a_meal_of_the_love/
This one isn't necessarily unpopular, but oh well:
http://www.mangago.zone/read-manga/akiyama_kun/
This one isn't BL, but it's a short oneshot and it's funny:
http://www.mangago.zone/read-manga/fumio_to_masashi/
I dunno what I'm looking for in a BL these days but I've been so incredibly bored.
Please everyone share the most underrated BL manhua/hwa/ga you enjoyed so much but isn't that popular either.. ┗( T﹏T )┛