In the second installment of the Seishun Buta Yarou series, Sakuta finds himself caught in a time loop after finally getting Mai to agree to date him. As he navigates this bizarre phenomenon linked to Adolescence Syndrome, he encounters a first-year student, Tomoe, who ropes him into pretending to be her boyfriend to avoid unwanted attention. With one lie spiraling into more complications, Sakuta must now figure out how to untangle the web of deception and reveal the truth to Mai.