One night, while Fushihara is working overtime at the office, she hears a scary voice from out of nowhere, commanding her to leave. She tries to ignore it and get on with her work, but then suddenly her monitor turns to black, with the word "Leave" repeated on it endlessly. When a frustrated Fushihara goes to look for the owner of the scary voice, what does she find but the little baby ghost, Yuurei-chan! When Fushihara explains to her that she can't leave until she finishes her work, the little ghost replies earnestly, "Then I'll help you! So you can leave!"

Despite having a fever, Fushihara is working overtime at the office again today. Taking notice of this, Yuurei-chan yells "You're gonna work yourself to death!" and proceeds to try and persuade Fushihara to leave. When Fushihara tells her that her being there with her motivates her, Yuurei-chan proposes that she go home with her, so that she can finish her work at home. Easily swayed by the ever-so-cute little baby ghost, Fushihara promptly agrees to her proposal and takes her home at once.

When Yuurei-chan appears in the office one night, Fushihara is oddly nowhere to be seen. Yuurei-chan is happy at first to see that Fushihara was able to leave early, but soon realizes that now she feels lonely without her. On top of that, a thunderstorm begins to roar outside. With tears in her eyes, Yuurei-chan tries to convince herself she's not afraid. That she's not lonely. Then moments later, she hears the sound of the office door opening...

Fushihara and Yuurei-chan have taken a black cat named "Myako" in from the rain. But it looks like Myako isn't just any ordinary black cat. To their surprise, Myako is actually a bakeneko, a ghost cat from Japanese folklore that is able to transform into a human. Myako takes on her human form, so that she may repay Fushihara for her kindness, and Fushihara gladly welcomes her into her home. Later, when Fushihara is doing overtime at the office, Yuurei-chan and Myako begin fighting over who gets to help her with her work...

The 5th of May is known as Children's Day in Japan. On this day, many people display koinobori or koi fish streamers in celebration. Back at the office, Fushihara is more worked up than usual. Knowing what day it is and having the image of Yuurei-chan and Myako looking fondly out at the koi fish streamers outside the window in her head, she's determined to get all her work done early today. Meanwhile at the apartment, Yuurei-chan and Myako are plucking daisy petals, wishing for Fushihara's safe return home.