由于双亲双亡之故，分别被不同亲属接继扶养的双胞胎兄妹──姬小路秋人与姬小路秋子，时隔六年，在离开了各自的寄养家庭之后，在东京展开了两人的同居生活。然而秋子在这六年间催成了极度的恋兄情结，对哥哥产生了爱慕之情！其后，秋人转学至秋子于东京都所就读的名门教会学校私立圣莉莉安娜学园，展开全新的高中生活。然而，秋人却遭与秋子同为学生会成员的副会长那须原安娜史塔希亚及会长二阶堂岚缠身；并且，过去在京都所熟识的朋友猿渡银兵卫春臣也追着秋人转学至圣莉莉安娜学园！
就算是哥哥有爱就没问题了对吧 (季节 1)
Brother Love (集 1)
播出日期: 2012-10-05
运行时间: 25 min
概述: Akiko moves into a school dormitory with her brother Akito, when he transfers to her school. Owing to her brother complex, Akiko has a crush on Akito. With both of them in student government, will Akiko be able to share him with the other council members?
Indecent (集 2)
播出日期: 2012-10-12
运行时间: 25 min
概述: Akito catches Akiko reading a trashy romance novel. Akito, having trouble settling in to in his class, is given firsthand lessons in the concept of "tsundere"from both Akiko and Anastasia. Akito and his longtime friend Ginbe get into an argument.
No Bra (集 3)
播出日期: 2012-10-19
运行时间: 25 min
概述: Akiko asks Akito for help changing her light. Akito has his hands full maintaining the dorm, from fixing the plumbing to repairing the doors. The girls have differing opinions over allowing Akito to take in the laundry. Akito helps Anastasia settle in.
Naked (集 4)
播出日期: 2012-10-26
运行时间: 25 min
概述: Akito brings home a special dessert, just for Ginbe to enjoy. Akito continues to fix up Anastasia's room, and the two of them discuss her hobby of collecting stuffed animals. Arashi has the girls take a bath together, to help them bond together better.
Sexual desires (集 5)
播出日期: 2012-11-02
运行时间: 25 min
概述: In a student government meeting, the council members discuss what they are going to call Akito. Kaoruko proposes that Akito write a short story to be published in a women's magazine. She grows concerned for him when she learns his sibling is a sister.
Mayonnaise & chicken (集 6)
播出日期: 2012-11-09
运行时间: 25 min
概述: Kaoruko reads the latest installment of Akito's love story. She decides to stop by the dorm, where she meets the others, and asks them whether they think Akito has a sister complex. The council decides to separate Akito and Akiko into separate rooms.
Chippai (集 7)
播出日期: 2012-11-16
运行时间: 25 min
概述: Akiko is upset over not being consulted before Arisa, who claims to be Akito's fiancée, was hired as dorm manager. Later that day, Arashi proposes that Akiko and Arisa compete in a contest, to see which one of them is the better little sister to Akito.
Colorful (集 8)
播出日期: 2012-11-23
运行时间: 25 min
概述: The girls all go to find new swimsuits even though summer is still in the distance. They try frilly ones, sexy ones, and cute ones. Then, Arashi proposes a contest to show of their new goods and Akito must decide which one impresses him the most.
Nii-Nii (集 9)
播出日期: 2012-11-30
运行时间: 25 min
概述: Akito follows Gin to the back of the school building to find out why she is acting so suspiciously. When Akito suddenly falls sick, everyone fights over who will nurse him back to health. They decide to take turns treating him how they see fit.
“Gindama” (集 10)
播出日期: 2012-12-07
运行时间: 25 min
概述: During her turn nursing, Ginbe reminisces about Akito's transfer to her school and how they first met. After Akito recovers he has to choose the winner of the contest he had no idea about. What is the prize and what will the winner do with such a chance?!
Ephemeral (集 11)
播出日期: 2012-12-14
运行时间: 25 min
概述: Unable to find her panties, Anastasia decides to go commando for the rest of the day. Arisa gets frightened by something she sees outside of the dorm and the group decides to investigate the source. All the while, Kaoruko sleeps in a feverish slumber.
It's love (集 12)
播出日期: 2012-12-21
运行时间: 25 min
概述: Everyone gets separated and Akiko is left alone with Nasuhara. While contemplating her panty dilemma, Nasuhara reminisces about her first meeting with Akiko. What will happen to Akito and his crew of crazy girls that sleep under the same roof?
季
集 12
集 6