Haruka Nogizaka's Secret

After Yūto Ayase returns an anime magazine to the school library, he accidentally runs into the most popular girl in school, Haruka Nogizaka, and discovers her secret that she is an anime and manga otaku which greatly distresses her. Haruka starts avoiding Yūto at all costs which causes others around them to blame Yūto for doing something bad to her. Eventually, Yūto finds Haruka on the school roof where he explains that he will not tell anyone about her secret hobbies if she does not want anyone else to know. This makes Haruka very relieved and happy that if anyone had to find it that it was Yūto.

Yūto and Haruka start spending more time together, such as walking to school together, which causes their peers to get annoyed that Haruka would be hanging out with someone like Yūto. Haruka asks Yūto to accompany her to Akihabara on Sunday and he agrees. The two spend most of the day going from store to store looking at the goods but not buying anything, though Haruka wastes some money on a toy vending machine. Yūto and Haruka even go to a maid café for lunch where Haruka is dressed in a pink maid uniform and gets her picture taken with Yūto. At the end of the day, they discover the handheld gaming console Haruka had intended to buy was sold out for now. This distresses Haruka, but Yūto cheers her up later by assuring her that he had a good time today with her.

The day before a test, Yūto comes over to Haruka's mansion and meets her younger sister Mika and two of her maids, Hazuki and Nanami. The next day at school, a guy bumps into Haruka which causes her bag to go flying which also exposes the Comiket catalog she had. Yūto manages to make everyone believe the catalog is actually his and Haruka only picked it up, though after this Haruka does not come to school for three days. He goes to see her where he finds out from Mika how her secret was exposed during middle school and she had to transfer schools due to being isolated from her peers. Yūto assures her that he will never leave her which relieves her so much that the next day she affirms after a short conflict that the catalog is actually hers.

Yūto, Haruka, Mika and Nanami become increasingly worried about Hazuki's attempt to distance herself from the family and thus decide to follow her on a shopping trip, meeting up with various familiar faces like Yūto's otaku friend Nobunaga, Yūto's sister Ruko and their teacher Yukari. Mika and Nanami eventually becomes distracted in buying lingerie, leaving Yūto and Haruka to the job and almost came to a conclusion that Hazuki was about to get married and quit her job. Before going home, they had a misunderstanding with a bridal shop where they are thought to be customers and were given a chance to take a portrait together with Yūto wearing a tuxedo and Haruka in a wedding dress. That night, Hazuki, much to everyone's relief, explains that she is not quitting, but was just going to a hardware store, which was located above the bridal shop, to fix her chainsaw.

The girl Yūto already bumped into twice turns out to be Shiina Amamiya, the new transfer student into his class. The school swimming tournament is coming the following week, but while Shiina can do an arrange of other skills, swimming is not one of her strong points, so Yūto and Haruka help her prepare in the school pool, but Yūto's sister, and Haruka's sister and maids come along too. At the tournament, Shiina gets a leg cramp during the race and Yūto jumps in to save her, and he takes her to the infirmary. She was not seriously injured, and was more shocked than anything else; Yūto reassures her that she tried her hardest, and that is what matters.

Yūto and Haruka attend the summer Comiket convention together, but since it is the first time for both of them, they underestimate the massive scale and hoards of people who attend. Mika, Hazuki, and Nanami tag along in disguise and help Haruka obtain a dōjinshi she wanted, and to get her out of trouble when people started taking pictures of her. Yūto and Haruka grow closer throughout the day, but after he leaves her at her house, Yūto is asked if he and Haruka were followed by anyone at the convention, but he says he did not see anyone like that. That night, a frantic Haruka unexpectedly shows up at Yūto's house.