Douki-chan is a respectable office worker with one goal: to seduce her coworker Douki-kun. Unfortunately, this proves easier said than done, as her plans are constantly thwarted by Kouhai-chan and Senpai-san—her two love rivals who will stop at nothing to win the affection of their beloved colleague first. Douki-chan will need all the luck she can get to surpass her competition and win Douki-kun's heart.