One night, when Mei returns home, she finds her mother, Midori, being taught how to cook by Nagisa! It seems that her mother wants to surprise her father on his 60th birthday. Taking that opportunity, Mei wants to fix the relationship of Midori and Yui, who left her parents' house 3 years ago, and got married, so she consults with Nagisa and they come with a plan! Mei also wants to know about Nagisa. On the other hand, Todoroko seems to be hiding something with being aware of Mei...