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 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.
Harumi, Futaba, Kazama, and Sakurai experience some awkward moments during an overnight beach trip with Yuto and Natsumi; Yuto opens up to Natsumi about a girl problem.