Popura and Jun end up catching colds due to Aoi's clumsiness, so KyÅko calls in two of her juniors, YÅhei and Mitsuki Mashiba, twin siblings who don't get along. When KyÅko offers to put someone else in charge of looking after Mahiru, SÅta becomes upset and falls out with Mahiru, but Mahiru soon manages to build up the courage to make up with him.