Murasaki and her bodyguard Lin invites Shinkurō, Ginko, Yūno, Tamaki, Yamie and Kirihiko to a Hotel and use the swimming pool for their private use. However, a group of disgruntled ex-employees are hired by Lucy May of the Akuu Company to set up chlorine gas in the building. When Shinkurō discovers the plot, he and the rest stop and capture the terrorists.

Ginko is helping Shinkurō for a client of his but her laptop breaks down which includes the data the client wants. Despite Lin allowing Ginko to use her laptop, she is reluctant to separate from hers. Murasaki accidentally drops Ginko's laptop but it's saved by Yūno which the impact causes the laptop to be working again. It is later revealed Ginko treasures the laptop as it was a gift from Shinkurō.

Kirihiko is troubled by Lucy's words that an assassin like her can never have friends so she decides to visit Shinkurō's school and finds Murasaki who has sneaked out from her school to meet Shinkurō too. As both of them search for him, they are discovered by Yūno and quickly run away while Kirihiko hides in the science lab. Meanwhile, Lin arrives and informs Ginko and Shinkurō that Murasaki has sneaked in. Yūno finds Kirihiko and tells the latter that she knows who Kirihiko is and wants to know why she is getting close with Murasaki. Before a fight ensues, Murasaki tells them to stop but when she falls from the tree she climbed, Kirihiko quickly jumps out to save her. After recovering from their fall, Murasaki apologizes to Kirihiko and knows that she is part of the thirteen Inner Families but has never judged her until she knew her, a lesson she learned from Yūno. Yūno, who has been listening, realizes she was wrong about Kirihiko and apologizes to her which comforts Kirihiko that she is capable of having friends.

Murasaki, Lin, Ginko, Yūno, Tamaki and Yamie decides to hold a party with Shinkurō at the apartment. After discovering a leak and trying to find its source, the girls find a collection of very old adult magazines under a sink in an empty room. Unsure of whether these belong to Shinkurō, the girls try various schemes on him. Instead, it leads them to his secret treasure, a box of his old anime toys, thus disproving the magazines don't belong to him. Unfortunately, when Murasaki keeps a deck of Playboy cards inside Shinkurō's box, he discovers it and gets angry for Tamaki for snooping into his treasure, which makes her think the magazines do belong to him and inform the girls that he is indeed a pervert much to his horror.