Misha invites Mimika over for a sleepover while Yasuhiro is away, with Yui deciding to tag along, remaining insistent that her mother's studio remain untouched. That night, Yui and Mimika get scared while visiting the bathroom and inadvertently flee into the studio, leaving footprints everywhere. The next morning, as Misha becomes furious upon discovering that the studio had been disturbed, Tsubame, not wanting Misha to lash out at her friends, takes the blame for the incident, leading Misha to direct her anger towards her instead and lock herself in the studio.