If you're looking for manga similar to K: Seven Stories - The Idol K, you might like these titles.
One day, 765 Pro idols Ami and Mami bring in the mysterious Petit-dols "Afuu" and "Yukipo"!? More and more Petit-dols gather at the offices where everyone works. Leisurely enjoy their daily lives full of laughs and happenings.
An official gag comic for the TV anime, "KIZNAIVER" appears! In this gag comic, all of the "KIZNAIVER" characters have turned mini, and live out unbelievable days in Sugomori City. You get to enjoy a slightly different story from the original.