To LOVE-Ru Darkness

The story begins with Rito rudely awakened by each Deviluke alien. Rito explains his routine life and is most concerned with Momo due to her deceptive intentions. As Rito arrives to school, he meets Haruna. Lala tries to encourage Rito to confess to her, but Rito pushes Lala to a corner and explains to he that the situation is complicated, as people are legally allowed to marry only one person. Out of nowhere, Celine clings onto Rito. Momo and Nana surprise everyone with their sudden enrollment in school.

Mea speaks with the mysterious voice about her day. The voice reminds Mea about her job: killing Rito and reverting Yami back to an assassin. Meanwhile, Momo warns Rito of the dangers posed by Yami and convinces him that Yami may change back and kill him anytime. Next, Momo is surprised to see Mikan invite Yami over for cooking lessons. Nana also comments on making a new friend to Lala. During the dinner service, Rito freaks out over Yami's taiyaki soup and thinks she may have set a trap. He nearly vomits and asks to go shopping.

Rito wakes up in his dream and finds himself inside his bathroom with Mea. Mea tests Rito's beast-like moves and asks Rito if he experienced something similar. She reads Rito's mind about Momo and her harem plan. Back in reality, Yami cuts Mea off from reading Rito's mind and warns her to not bother Rito. Mea walks off and learns about the harem plan and how she and Momo are competing for Yami. Later, Nana introduces Mea to Lala and friends. Rito sees Mea and realizes her from the dream earlier. As Mea speaks obscenity to Rito, Momo considers adding Mea into her harem plan.

A mysterious assassin named Azenda arrives on Earth seeking vengeance against Yami. Mea questions her regarding Yami, but master believes Azenda could help revert Yami back into an assassin and kill Rito. Meanwhile, Mikan wakes up to find Celine missing. She hears moaning noises from Rito's room and blasts into it only to find him playing a game with Momo and Celine. Momo tries to reassure Mikan that she's only supporting Lala's love, but Mikan does not believe it. In the shower, Momo wonders who destroyed her barrier and relates it to the fact that someone is targeting Rito and Yami.

During swimming class, Mea feels dejected about the Azenda fight. Earlier, she tried to convince Yami to revert back into a weapon, but Yami rejected that and explained that there is more to life than fighting. On the other side, Yami talks to Momo regarding Mea's stubborness about living as a weapon and how she was like her before. Nana finds Mea depressed and looks for ways to cheer her up by asking Rito for advice. Rito suggests to do something fun with Mea, giving Nana an idea. Afterschool, Nana takes Mea to the riverside, where she has an event prepared.

Momo offers to show her body to Riko. Riko sidetracks by asking where Mea went. Momo replies, "She left." As Momo questions Mea's intentions, she shows Riko the secrets of a female's body by touching her private parts. Mea sneaks in and witnesses Momo's deceptions. Using the memory she got from Rito before, Mea forces Momo to let her in regarding the harem plan. Momo reluctantly accepts, hoping that Mea can get master to come out. Mea and Momo lick Riko until Riko changes back into Rito. Mikan enters the room and is shocked to find Mea and Momo along with a naked Rito. Mea exposes Momo's cover-up, making Mikan scold at all three of them and kick Mea and Momo out of Rito's room.

As Lala fixes up Nana's De-Dial, Momo tells to Nana grow up while looking at her chest, infuriating Nana. Lala brings out an item that grows Nana's breasts, but it only works for a few seconds and shrinks Momo's breasts. Momo sarcastically admits that she understood Nana's feeling. Later in Mikado-sensei's office, Rito and friends discuss about Lala's inventions and Oshizu asks about Lala's childhood. Momo recalls the frequent incidents with Lala's inventions; whenever she was fighting with Nana, Lala's inventions ran wild and they both cleaned up Lala's mess.

Mikan feels misplaced after seeing Rito become closer to Momo. She goes shopping and almost passes out on the way home due to the intense sun. Momo runs to save her but Kujou Rin grabs her and offers to take her to her place. Mikan feels the need to vent and starts telling Rin about how she feels misplaced. While Rin expresses negative thoughts about Rito, Mikan explains that despite his perverted actions, Rito is a really great guy. She also tells Rin about how everything seems to have changed since Momo's arrival. Although Momo appreciates Momo helping around the house with chores, but Mikan feels she is no longer needed. Rin tells Mikan that no matter what Momo does, if Rito is how Mikan describes him, he would not want Mikan to leave. During the conversation, Momo eavesdrops from the rooftop.

The episode begins with Rito thanking Rin for taking care of Mikan. Later, due to one of Lala's inventions, Rito and Yami become stuck to each other by the hand, Yami immediately tries to cut Rito's hand but Momo explains the effects will wear out eventually. Yami goes to buy food with Rito and makes it clear she does not want him touching her inappropriately over her food. While she is buying taiyaki, Rito gets embarrassed when the seller thinks they are a couple. They sit on a bench where Rito invites Yami over for dinner at his house which she accepts.

Yami starts telling Rito about her past, explaining how she was created by a woman named Tearju Lunatique using her own cells, therefore Yami is effectively a clone Tearju and sees her as her mother. However, Tearju was taken away from Yami by the association that had asked to create Yami. They forced Yami to follow the path of darkness and trained her to be a weapon. She doesn't know what happened to Tearju and also notes that the society was destroyed when the Devilukes unified the universe. Rito demands revenge, which confuses Yami given that Rito is her target.

Tearju tries to talk to Yami and apologizes for abandoning her. She tried to escape with Yami when the organization tried to eliminate her, but the plan was foiled and Yami was taken away. She hid her identity until the organization was destroyed. Yami refuses to let her life as "Golden Darkness" go and walks off making Momo concerned about Yami's honesty. Mikado finds the situation normal as they have not met each other for a long time. Meanwhile, Nana tells Mea about a new assistant in Lala's class triggering Mea's instincts after master told her about Tearju being one of their main enemies

Momo plays through several dating sims and takes notes hoping to aid her harem plan. As Momo completes another pathway, she wonders how she can use these concepts to solve the main issue: Rito. Momo wonders when she fell in love with Rito and remembers how Rito shared many interests with her such as plants