Part 1 It's Sunday morning and the Minami sisters get up for breakfast with Haruka preparing it. Chiaki wakes up to help and Kana wakes up just to woot about going off for a "second nap." Not getting the attention she wants, Kana decides to help prepare breakfast with lousy results that get Chiaki mad.
Part 2 With Kana on cooking duty for preparing dinner, Chiaki helps Kana to avoid having to taste her disastrous cooking talents. Even with Chiaki helping out, it doesn't stop Kana's impulsiveness from ruining tonight's dinner.
Part 3 Following a watch of "Sensei and Ninomiya" where the two characters are kissing, an embarassed Haruka changes the channel and tries to evade the subject of kissing when Chiaki is curious about it. With Haruka hesitant to tell Chiaki about kissing, Kana decides to take the initiative to show her younger sister kissing which results in Kana chasing Chiaki throughout the house.
Part 4 When Kana wakes up late for school, there isn't enough time for Haruka to cook a decent breakfast for her. Kana winds up with only a onigiri to chow on and fusses over this to her friend Keiko at school.
Part 5 Kana winds up getting a love letter from Fujioka and is nervous over how to react to it. However, Chiaki's overanalytic view on the situation leads Kana to interpret the love letter as a challenge and she beats up Fujioka the next day.