Haruka decides to be eco-friendly in their house because of last month's utility bill. To Kana and Chiaki's dismay, Haruka doesn't allow use of the kotatsu besides during dinner. Chiaki sees that Haruka's hands are red in an effort to save money by switching to washing dishes with cold water and decides to do her best at being eco-friendly as well. Takeru comes by and Kana persuades him to take them out to dinner...