Even though Koki Nakagawa and his childhood friend Ayumi Fujisaki bicker like cats and dogs, one thing's for sure...he's head-over-heels in love with her. But when he finally starts to confess his feelings, his awkward-but-nice-enough classmate, Jindo-san, announces that she's Koki's girlfriend! She tells Koki that he can never tell Ayumi his true feelings...because if he does, the world will end in apocalyptic disaster? What's a guy to do?
Having finally recovered Ayumi’s stolen powers, the situation appeared to have been all but wrapped up. However, the enemy’s final struggle ends in Koki being shot. Hikari can use her powers to bring someone back, but she only has enough for one! Will it be Koki or Ayumi…? The final decision Hikari arrives at in the greatest choice of her life is… “I love you, Ko-kun!” Welcome to the magnificent conclusion of this supremely extravagant, ultimate choice romcom!