In front of 17-year-old high school girl Kayo Hanazono (Momoko Tanabe), suddenly, 'I' (Kayo Noro) who became an Arasa from the future came! And a warning! 'I'm single for the rest of my life, and even if I reach 30, I'm a virgin! A childhood friend, Shinnosuke (Takumi Kizu), who is even more worried, will marry a classmate different from Kayo! Kayo, who was told the fact of the shock, started her actions with Arasa, saying, 'I have to turn around Shinnosuke and change the dangerous future!' However, a mysterious handsome Taki (Fuju Kamio) aiming for Kayo, and Shinnosuke's future marriage partner Kushida (Mei Tanaka) have appeared, and a square-related battle of love breaks out! Can Kayo change the future? 

Kayo (Momoko Tanabe) is finally in danger of being robbed of her first kiss by Taki (Fuju Kamio), but her magical hand extends to Arasa (Kayo Noro). Taki threatens Arasa to burn her time machine blueprints and tries to help her. Furthermore, Shinnosuke (Takumi Kizu), who loves Kayo and Taki's kissing scene, was witnessing it! Kayo consults with Arasa, but Taki appears there and tells him that 'I will persuade Shinnosuke.' However, at the wrong time, Shinnosuke witnesses Kayo and Taki in the room again ... Kushida (Mei Tanaka) explodes his love and kisses himself uncontrollably to Shinnosuke who is depressed! And Shinnosuke answered that ... 'Kon Mira' angry love triangle, finally started!