"Liar Liar - Episode 5" is set in bustling Tokyo, where the main characters navigate their lives and relationships. The episode begins with Yuki waking up in her apartment. She receives a text from her friend Rina, inviting her to a nearby café. Yuki accepts and sets off, passing by the city's landmarks like Tokyo Tower and Shibuya Crossing.


At the café, Yuki and Rina chat about their school life. Rina shares her worries about an upcoming math test, while Yuki offers her support and suggests studying together. Their conversation is interrupted when a mysterious man named Hiroshi suddenly appears. He introduces himself as a novelist researching high school life for his next book. He asks Yuki and Rina if he can talk to them, which they agree to.


The scene then shifts to the school, where Yuki and Rina are studying in the library. They discuss Hiroshi's visit and his interest in their lives. Yuki expresses her admiration for Hiroshi's work and reveals that she is a fan of his novels. Rina, however, seems skeptical of Hiroshi's intentions.


Later, Yuki receives a call from Hiroshi, inviting her to a book signing event. Yuki is excited about this opportunity and agrees. At the event, Yuki gets the chance to talk to Hiroshi, who praises her honesty and straightforwardness. He also asks her to assist with research for his next novel, an offer Yuki enthusiastically accepts.


The episode ends with Yuki walking home, reflecting on the day's events.