There are specified facet characters which have quests to accomplish. Beating mentioned side quests unlocks interactions with Everyday life. Atsushi Takayama: Target from Yumi Shiina's Synergy tales. A person who when saved harassing Yumi with unreasonably harsh opinions on her dancing functionality, which eventually induced her to quit dancing. https://www.youtube.com/watch?v=ILKyE5vBc8A