With next year's university entrance exams looming, high school senior Yoshiyama Mihane is beginning to feel the blues. She recently joined the school's photography club. As she walks by the science lab one day after school, she smells the aroma of lavender. From that moment on, she acquires the ability to leap freely through time and the days ahead are marked with bizarre occurrences...
Fukamachi is Mihane's classmate and childhood friend. Or at least that's what everyone thinks. The truth is, Fukamachi came from the future, where he is a brilliant researcher who develops a drug that enables time leaps. He uses the drug to visit the year 2016 but loses it and is unable to return for the time being.
Her romantic feelings for a boy that came from the future lasts but a few days, and those memories are now beginning to fade.
Yukiko Makabe works at the #3 Special Investigation Team of the Metropolitan Police Department. She has excellent negotiation skills. Yukiko then attempts to negotiate with a hijacker on a bus, but something unexpected happens and her mission fails. Yukiko takes full responsibility and takes a transfer to a special interrogation team "Kintori". Her boss is Katsutoshi Kajiyama and Yukiko has had a difficult working relationship with him in the past. Her other coworkers include Susumu Hishimoto, Zenjiro Nakata and Haruo Koishikawa.
A man with leather gloves asks a girl to place a can of cookies in the police substation. Because of this, a police officer dies. Tetsuji Watanabe and Daijiro Kenmotsu, detectives from the #1 investigation team, finds out the identity of the man in leather gloves. They believe the culprit is famous attorney Fujishiro who only takes on miscarriage of justice cases. Fujishiro vehemently denies his involvement in the cookie incident during his interrogation by the Kintori team. Around this time, a man turns himself in and takes responsibility for an explosion at a police substation.
