Yukari Shiradaira, a successful advertising professional in Tokyo, finally feels fulfilled in her career and is about to marry her workplace sweetheart. Life seems perfect—until Arika Fūrin, a junior from her high school and college days, suddenly transfers to her company. A Shocking Reunion: "Long time no see!" Arika greets her cheerfully, but Yukari is frozen. Their past ended in unresolved conflict, and Yukari had deliberately cut ties after graduation. Unwanted Proximity: Yukari tries to avoid Arika at work, but Arika ignores her boundaries, invading her space with relentless friendliness. Is it reconciliation… or revenge? The Confidant: Yukari turns to Ren Takanashi, her designer best friend, for advice—only to realize Ren might know more about Arika’s motives than she lets on.