Being seen as a full-fledged businesswoman isn't easy for Futaba Igarashi when her loud mouth senpai, Harumi, treats her like a kid; days for her are never typical, at work or outside of it, with all the antics going on in her life.
Futaba Igarashi and Harumi Takeda overcome a setback and celebrate a major success; when the alcohol kicks in, Futaba's true feelings come out.
Unhappy with her physique, Futaba seeks advice from Sakurai, the most attractive woman at the office; Harumi shows his protective side.
Futaba and Harumi catch a cold one after another, and end up taking care of each other.
Harumi and Futaba turn out to have a shared birthday; Harumi ends up bonding with Futaba's grandfather; Harumi presents Futaba with something special on White Day.