Mitsuki holds a Fullmoon mini-concert at the Hiiragi Preschool. All the kids love her except for this one mean little boy, Taiki, who looks very similar to Eichi. As the day goes on, Taiki does a lot of bad things to Mitsuki from stepping on her foot to stealing her stage costume to wrecking the entire concert. Despite all that has happened, Mitsuki still feels that Taiki did all this for a good reason.