The romantic subplot isn’t just for fluff. Leaked spoiler threads on Japanese forums (2channel) suggest that Chapter 17’s raw pages include a flashback to Tanaka’s own "kyuuin life" (job-hunting life) failures. This could be the key to understanding his reserved personality.
Several factors are driving this intense demand:
As this is a "Raw" release, it is strictly in Japanese. English scanlations usually follow shortly after the raw release.
In the leaked preview pages of Chapter 17, pay attention to a specific two-page spread. It depicts the hospital hallway at 3 AM. The shading is reportedly darker than usual, using a new screentone technique to simulate the flickering of fluorescent lights. Even without understanding the Japanese text (the "raw" text), the emotional weight of the scene is fully conveyed through the character’s swollen eyes and trembling hands.