Kanna starts living with Tohru and Miss Kobayashi. While the livelier residence is nice, sharing a tiny apartment with three people becomes cramped. So Miss Kobayashi decides to move. She winds up inviting Takiya to her new apartment for a party, but Tohru also invites her dragon friends, Fafnir, who lives in a cave, and Lucoa, who's lived in this world since ancient times, to visit their new home.

Miss Kobayashi and the others go to the beach. But Lucoa's immediately dragged off by one of the lifeguards for her overly skimpy swimsuit. After regrouping, they put sunscreen on each other, split a watermelon, go swimming together, and enjoy summer to the fullest. After the beach, it's comiket! Tohru and Miss Kobayashi both head for the otaku's battlefield, and even Tohru gets shivers from the incredible aura surrounding those otaku. While helping Takiya with his circle, Tohru's horns and wings are mistaken as cosplay?!

On Valentine's Day, Tohru attempts to give Kobayashi some chocolates containing a love potion, but she quickly sees through her plan. However, Kobayashi ends up eating some of it after mistaking it for chocolate Kanna received, although the love potion gets cancelled out by some alcohol that was included in the chocolate. Later, Makoto invites everyone on a trip to a hot spring inn, where Tohru gives Kobayashi some regular chocolates.

Saikawa visits Miss Kobayashi's home to play. However, there's a girl that's unfamiliar to her (Ilulu)... Even after inviting her to join their games, Ilulu coldly refuses. Then Lucoa happens to stop by and she notices Ilulu's feelings as she tries to avoid them, so she makes an effort to help the dragon out.

Elma and Tohru snarl at each other every time they meet in the shopping district. Miss Kobayashi is exasperated at that typical scene, but they mention it wasn't like that when they first met. Even though they get along like oil and water now, their first encounter took place long, long ago. It happened way back when Tohru was traveling by herself through the other world...

Miss Kobayashi's hips have seriously started hurting. She buys up a bunch of health products to try and improve it, but she hardly uses any of them... Even Tohru loses her patience and tries to get her to eat tail meat, but she sadly refuses. Tohru then begins her search for what Miss Kobayashi considers a "typical remedy."