A class reunion is held for the first time in over a decade. While reuniting with her classmates and reminiscing about old times, Hikaru can't take her eyes off her ex-boyfriend and first love. And the same goes for him. Their relationship naturally faded away after graduation. Now that they both have families, he thought they had long since cut off any regrets. But he is drawn to the beautiful and mature Hikaru again. Even though he knows it's not allowed, Hikaru rekindles the fire of his love that should have gone out.