The main story is The Case of Ritsu Onodera, which was the first story told in the manga series. The story follows rookie manga editor Ritsu Onodera as he begins his new job at Marukawa Publishing. Ritsu finds that his new boss, Masamune Takano, is his first love from high school, and Takano is determined to get Ritsu back. A complementary story line, The Case of Masamune Takano, tells some aspects of their story from Takano's perspective.

The second story is The Case of Shouta Kisa, which follows the manga editor Shouta Kisa and his relationship with Kou Yukina. A complementary story line, The Case of Kou Yukina, tells some aspects of their story from Yukina's perspective.