lol sorry for the weird topic 😛
but i want a story that talks about a main couples and then maybe the brother of one of them is in love with the others friend
and for example: dounimo naranai | love home
< the first chapters talks about a couple and then it talks about a different couple that are related to the main couple..
any kind of stories will do..

i don't even know how to make u get it :\ but i hope u did get what i meant 😁

What you want is under the "Collection of Inter-Linked Stories". So of them have a brother side story, others a friend side story and others are just realted somehow:
Try Tsuyogari, Sukitte Iwasete?, Mainichi Seiten! series, Sannin Gurashi, Twin's Labyrinth, Mae yori mo Dare yori mo, Darling, Ai no Kotoba mo Shiranaide, 24 Jikan Eigyouchuu, Kibun wa Joujou!, Nikushokujuu no Table Manner, Shisei no Otoko (this one is awesome, sad and the way the stories are related is just... awesome, but it's really sad!), Sawatte, Tokashite (just a little inter-linked), Wild Rock (read with attention, the stories are related, but you need to understand how... <3), Ikenai Otoko?! Don't know, haha, Kagakushitsu e Douzo, Heart Strings, Otona Keikenchi, Kooporasu e Youkoso, Kunshu no Ai wa Yoru ni Hana Saku, Sentimental Garden Lover, Taka ga Koi Daro and after that Aiso Tsukashi, Doukyuusei and after that Sora to Hara, Junketsu Drop and after that Interval Zero, Yume Musubi, Koi Musubi and after that Himegoto Asobi, Omairi desu yo maybe, Mori no Koe, Papa I Love You and after that Baby I Love You, Shinobu Kokoro wa, Nekasenaide, Dolce, Suki de Shikatanai, Hand Which first chapters, Bukiyou na Silent, Challengers and after that Koisuru Boukun, Renai Kyoutei Nukegake Nashi!, Miwaku no Ringo and other mangas by the same mangaka, Café Relish ni Oide, Isso Mou, Kudokitai!, Oyaji Hiroimashita...

There is more and I'm a little angry because I can't remember the titles. If I remember, I'll edit for more.

many secondary couples:
Usotsuki Lily

in need of romance?
uncommon, sad, sweet

Quote from Lorska

many secondary couples:
Usotsuki Lily

Oh, do you want any genre? Or only Yaoi/Yuri? I always forget to ask and I only give yaoi suggestions.

just yaoi/yuri
and thank you <3 (: