Yua and Ikumi, both passionate about cleanliness, work hard at their part-time jobs as cleaners. They are close seniors and juniors, but unbeknownst to Ikumi, Yua secretly harbors feelings for her as a lesbian. However, Yua never confesses these feelings, keeping them hidden within her heart, never crossing the boundary of their senior-junior relationship. Yet, during a night out when Ikumi gets extremely drunk and collapses, Yua finds herself unable to suppress her impulses as she takes care of her.
