Hitagi and Tsubasa take turns tutoring Koyomi at his house during summer vacation. On the morning of July 29th, Koyomi visits Mayoi and Nadeko, because Tsubasa takes a day off.
While Koyomi is in Sengoku's place, she informs him that his sisters are acting strange and they are somehow investing an spell, therefore Koyomi decides to talk with his sisters.
Part 4 of 7. The night of July 29th. His sisters tell Koyomi that they are helping Tsubasa, who discovered Kaiki is the center of her problems. Koyomi patches things up with Shinobu for the first time in a few months.
Part 6 of 7. July 30th. Karen is recovering from the bee curse because Koyomi took half of it. Hitagi decides to face Kaiki herself, for he was one of frauds who swindled her family.
Part 2 of 4. On their way to Suruga, Koyomi and Karen are approached by a mysterious woman and her helper, who are looking for the abandoned building where Meme used to live.
Part 3 of 4. Koyomi and Shinobu manage to get some information on Kagenui and Ononogi from Kaiki. They arrive home just in time to witness Ononogi murdering his sister in cold blood.