Inu X Boku Secret Service

Kotarou has a conversation with Sorinozuka about his worries on what might happen when his father reincarnates, but then Zange comes out of a bush and suggest making a time capsule so Kotarou can send a message to his father's reincarnation in the future. Zange invites Watanuki and Karuta to join and eventually everyone else joins in too, as well as Ririchiyo, who recounts how she was when she first arrived at Ayakashikan to how she is now. While Kotarou thinks of what to write, he is comforted by his father, who states that the him who has not met Kotarou or his mother is not him at all. As they bury the time capsule. Sorinozuka notices that Ririchiyo accidentally placed a letter written to Miketsukami into the time capsule. Realizing that she accidentally switched a letter to Miketsukami from the one meant for her future self, which stated she will not run away and stay by Miketsukami's side, she runs off to Seijou Park. After talking with Miketsukami over the phone, while he goes to fetch her, Ririchiyo realizes that Miketsukami hates himself like she was before, but she was able to overcome the ordeal because she fell in love with Miketsukami. Knowing she has hurt others to protect herself, she decided to use her courage to save Miketsukami by confessing to him and Miketsukami embraces Ririchiyo stating that he too loves her. The ending credits shows separate clips of certain scenes in the manga and ends with Miketsukami revealing that his only dream is to have a child and a family. Ririchiyo decides not to answer him because it is an important decision and that they have plenty of time to decide.

Miketsukami history is exposed. While other families revel when a child with youaki blood is born, it is vastly different in his family. Kagerou tells Ririchiyo that he was not the one who wrote her letters back then and Ririchiyo exclaims that she already knew that. The truth of Miketsukami obsession with Ririchiyo is exposed. Kagerou is bored with the fact that Ririchiyo wasn't upset to an extent, therefore telling her that Mikestukami was the one who was writing her the letters in the past. With the realization concluded, she felt that is why Miketsukami noticed her. However, Mikestukami rushes to hug Ririchiyo and exclaims that it was her that noticed him.

The night in which Miketsukami and Ririchiyo are planned to drink tea together is cancelled by the unexpected return of Kagerou and his welcome party. When Miketsukami and Ririchiyo plan to drink tea together the very next day, this is cancelled by Kagerou when he decides to spend the rest of the day with Ririchiyo out on the town. Later that night Ririchiyo grows anxious by Miketsukami not responding to her apology text, so she decides to visit his room and offer him a melon of apology. When she does apologize, Mietsukami say's strange unusual things, causing her to get flustered and return to her room. It is then that Ririchiyo realizes she wants to be with Miketsukami. The very next morning, Miketsukami begs Kagerou in not telling Ririchiyo his hidden secret. Kagerou denies, leading to an intensive battle between the two. Ririchiyo finds the two fighting and orders them to stop at once, and asks them to explain what the problem is. It is then that Miketsukami admits he is hiding something from Ririchiyo.

A series of commands have appeared in the mansion causing quite a stir. But that means nothing to Ririchiyo as she frets over her upcoming tea with Miketsukami. She constantly ask her self on what they will talk about, what kind of tea will they drink, and if she will be able to be true to her feelings.