TSUKIUTA. The Animation
A Idols (Male) and Music series from 2016 worth adding to your list.
Tsukino Talent Productions is home to two up-and-coming idol units named Six Gravity and Procellarum. The units all live together in the same dormitory and try to juggle their budding careers and daily lives. At their joint handshake event, unit leaders Hajime Mutsuki and Shun Shimotsuki announce the "Full Moon Festival"—a collaboration concert in a few months. Excited about the upcoming event, these 12 male idols must learn to collaborate with each other in order to pull it off successfully.
Plot summary from MyAnimeList. Data and images via Jikan API.