MrsHatake'sFavorites

ch1, 5.4, 5.5 - NightS - criminal x detective, older uke
ch2, ch2.5 - Kanjou spectrum - misunderstanding, students, shounen ai
ch3-5 - Reply - salesman x mechanic, light yaoi, drama

From book "Mayonaka Love Alliance"
Story1: Otoshiana ni Hamerarete
Story2: Pinup Boy
Story3: Yoru mo Hi mo Akenai
Couples are connected

Shiny Star (Spin off)

Azami (Prequel/Sequel)
Renai Rubi no Tadashii Furikata (Spin-Off)
Hadakeru Kaibutsu (Spin off)

Azami is doujinshi written after it's sequel (this story) so my recommendation is to read this one first, Azami is there to help you understand their relationships better.