Overworked office woman Ayumi Sasaki is no stranger to mishaps. Constantly facing pressure at work and only finding solace in the after hours drinking parties, and her lewd dreams involving boy band members. Her life is incredibly monotonous.

That is, until the day she wakes up next to her phone that doesn't belong to her. She wouldn't normally be concerned with the properties of others, but the voice on the other end is clueless, relentless and annoying.

She doesn't know it yet, but the owner of that voice is also about to change her life.