Rent-a-Girlfriend

While in his apartment, Kazuya recalls Chizuru telling him a famous director will be scouting the upcoming play she is in. On the day of the play, Kazuya decides to watch it. Unbeknownst to him, Sumi is also watching it nearby. During the play, which is titled The Heron Princess, Chizuru plays the role of Nene, a kunoichi, and her performance is acclaimed by the audience.

Kazuya hangs out with his friends before he heads to work, where he asks and receives advice from his boss. After work, Kazuya meets up with Chizuru. During their outing, Chizuru tells Kazuya that he has no obligation to keep paying her. She also expresses her concern towards Mami and Ruka.

Chizuru reveals she has lost her key before she walks inside Kazuya's apartment. Kazuya becomes flustered about the situation until he sees Chizuru go out onto the balcony to check her backdoor. However, this leads to an awkward moment between the two when he saves her from falling. Just then, Mami unexpectedly shows up, which causes them to hide.

Mami asks Kazuya if she is responsible for him renting Chizuru, which he awkwardly denies. She then tells him that he should get a real girlfriend. Once they part ways, Mami insults Kazuya for lying to her before she approaches Kibe in the hallway. After work, Ruka decides to cook a meal for Kazuya at his apartment. Later on, they learn a typhoon has hit the area.

Three days later, Kazuya and Chizuru run into each other outside where Kazuya notices Chizuru is acting distant. When he returns to his apartment, he learns that Chizuru's birthday is in four days. On Chizuru's birthday, Kazuya decides to rent Sumi. During the outing, he asks her advice in terms of what Chizuru would like for a birthday present.

Kazuya and Chizuru meet outside where Chizuru thanks Kazuya for the birthday present. When he attempts to rent her for the following week, she reveals she will be too busy hanging out with her friends. On campus, Kazuya's friends invite him to a drinking party. Later that night, Kazuya and Chizuru encounter each other at the party, much to their surprise.

The next morning, a hungover Kazuya cannot remember what happened the previous night. He then heads to school where he hangs out with the group from the drinking party. When he returns home, he discovers Chizuru was indeed in his apartment. At work, Ruka is disappointed to learn that Chizuru does not believe she and Kazuya had sex.

Kazuya is eating dinner when he receives a call from Ruka, who apologizes for how she acted towards Mami. Elsewhere, Mami engages Kazuya's grandmother on Twitter. Back in Kazuya's apartment, he discovers Chizuru has been promoted. Sometime later, Kazuya and Chizuru have an outing at Tokyo Dome City where both are wearing high school uniforms.

Once Kazuya's grandmother learns Chizuru's birthday has already passed, she decides to turn Kazuya's birthday party into a combined party. When Kazuya invites Chizuru over to his family's house, she informs him that she will arrive there after she visits her grandmother at the hospital.

After a long, passionate kiss, Ruka tells Kazuya she does not want to lose and she has no regrets. Once they return to the party, Kazuya's grandmother attempts to give Chizuru the family's engagement ring. Realizing the situation has gone out of control, Kazuya decides to tell everyone that he and Chizuru broke up.

While on their balconies, Chizuru informs Kazuya that Sumi wants to see him. A few days later, he meets up with Sumi where he notices she is wearing a high school uniform, revealing she saw him and Chizuru at Tokyo Dome City. They then head to a marine mammal park. There, Sumi acts as Kazuya's guide. After a while, she takes him to a dolphin show where she attempts to confess her feelings.

After another failed audition, Chizuru thinks about her grandfather. In a flashback, her grandfather told her dreams always came true. He then took her to a shrine where he told her about a legend. Once she discovered her grandmother was indeed an actress, Chizuru decided to become one as well. Her ecstatic grandfather promised he was going to watch her.