Nice to meet you & Welcome to Yaoi world.ヾ(´▽｀✿)ゝ
Actually Sekaiichi Hatsukoi is well known but released long ago.
If you like long series, how about trying this..
http://www.mangago.me/read-manga/super_lovers/
http://www.mangago.me/read-manga/crimson_spell/
http://www.mangago.me/read-manga/honto_yajuu/
http://www.mangago.me/read-manga/hana_no_mizo_shiru/ - 1
http://www.mangago.me/read-manga/hana_no_migoro_ni/ - 2
http://www.mangago.me/read-manga/hana_no_miyako_de/ - 3
http://www.mangago.me/read-manga/nekoka_danshi_no_shitsukekata/ - The main story is shounen-ai but all related series are smexy yaoi. To follow their order, it's better to look from here.. http://www.mangago.me/home/mangalist/1491/ # 3-12
Thanks for the suggestions and its great to be part of the family ╮(￣▽￣)╭
Hi I'm new to yaoi and I love your lists, I would love it if you could suggest some good manga. It would also be nice if they weren't that well known like sekaiichi hatsukoi. (๑•ㅂ•)و✧