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.
On the evening of July 29th, Koyomi comes across an eerie man, Deishû Kaiki, in front of Suruga's house after he visited her.
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 5 of 7. Karen develops a high fever. Tsuhiki and Tsubasa tell Koyomi what happened between Karen and Kaiki when she visited to beat him up.
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 7 of 7. Koyomi and Karen fight over the importance of justice. Hitagi and Koyomi confront Kaiki to bring his deceit to an end.
Part 1 of 4. August 14th. Karen begs Koyomi to introduce her to Suruga. He agrees to do so if she can last a little game of his.
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.
Part 4 of 4. Koyomi finds out the truth about Tsukihi's identity. He and Shinobu decide to fight Kagenui and Ononogi to save her life.