3x10 - Hidamari Sketch

After accidentally flushing her apartment key down the toilet, Yuno asks the landlady for another one. While the landlady tries to find the spare key among various other junk, Yuno spends each night sleeping over at each of the residents' apartments. After five nights, the landlady manages to find the spare key and Yuno finally returns to her apartment, only to be greeted by a foul smell from some leftover cooking.