I'm looking for a yaoi manga series with two (i think) books.
The pairs are: Seme- Three brothers, the youngest is a part-time modell, the second is working as an actor and the oldest is a screenwriter. Uke - Two brothers and their cousin, the younger brother is a classmate with the model, don't remember how the older met his seme, but is paird with the actor and the cousin met the screenwriter when he went to visit his two cousins.
The first book has the younger brothers and their respective partners and in the second book the oldest brother and his partner comes in.

Please, can someone tell me the name of the manga and/or the mangaka? I've been trying to find it myself, but to no avail. 😔
Getting desperate. 🙁 🙁

Youngest brother’s story: Chapter 4 (Pure thread of first love) in Issho ni Kuraso
Middle brother’s story: Henai Prince
Oldest brother’s story: Unmeinanosa

Thank you 😁 😁