In anime, there are many different types of relationships between siblings. Some siblings are close and supportive, while others are more distant. And then there are the siblings who have a brother complex.
A brother complex is a term used to describe a sibling who has an obsessive or unhealthy attachment to their brother. This can manifest itself in a variety of ways, such as the sibling being overly protective of their brother, being jealous of his relationships with other people, or even having romantic feelings for him.
Related: 5 Anime where the main character hates himself
Brother Complex Anime
5. Onee-chan ga Kita
“Oneechan ga Kita” is a heartwarming comedy anime that follows the story of Tomoya Mizuhara, a 13-year-old boy whose life takes an unexpected turn when his father remarries. With this marriage, Tomoya gains a new family member, his 17-year-old step-sister named Ichika.
The central character with a brother complex in “Oneechan ga Kita” is Ichika, Tomoya’s step-sister. Ichika is an outspoken and passionate young woman who genuinely adores her new little brother. However, her love and protectiveness for Tomoya sometimes border on being stalkerish and possessive, which leads to hilariously awkward situations. Despite her quirks, Ichika’s affection is driven by her deep care and concern for Tomoya’s well-being.
4. The Irregular at Magic High School
In a world where magic has become a systematic technology, siblings Tatsuya and Miyuki Shiba find themselves enrolled in First High School. Miyuki, a prodigious magician, is placed in the prestigious First Course, while Tatsuya, despite being magically inept on the surface, possesses exceptional technical knowledge and unique magic techniques. As the irregular student in a magical high school, Tatsuya’s abilities and talents make him stand out in unexpected ways.
Shiba Miyuki is a first-year student in Course 1 of First High School and the younger sister of Shiba Tatsuya. Miyuki deeply cares for her brother and is fiercely protective of him. She displays a warm and loving nature, always ready to defend Tatsuya whenever the need arises. Miyuki’s feelings for her brother go beyond the typical sibling bond, as she occasionally hints at having romantic affections for him. She wrestles with guilt over her perceived superiority as a “genius” while Tatsuya, in her eyes, is considered a reserve magician but is, in fact, the true genius.
3. Ane Log
“Ane Log” follows the story of Konoe Moyako and her younger brother, Akira. When they were children, Akira expressed his desire to marry Moyako, which she interpreted as a sign of perversion. As they grow into teenagers, Moyako becomes convinced that she must “rehabilitate” Akira and prevent him from developing an unhealthy obsession with her. However, unbeknownst to her, it is Moyako herself who harbors deep feelings of obsession towards her brother.
Character and Relationship:
Konoe Moyako is the protagonist of the story and the character with the brother complex. She is a teenage girl who firmly believes that her brother, Akira, is fixated on her in a perverse manner. Moyako takes it upon herself to protect Akira from his alleged obsession by engaging in various comical and often exaggerated attempts at reforming him. Despite her outwardly determined and confident demeanor, Moyako’s actions stem from her own hidden desires and feelings of possessiveness towards Akira.
2. Onii-chan Dakedo Ai Sae Areba Kankeinai yo ne!
After the unfortunate demise of their parents, siblings Akito and Akiko Himenokouji are separated and forced to live with different families for six years. However, they are finally reunited and begin living together. The story revolves around Akiko, who has developed feelings for her brother. Sadly, Akito only sees her as a sibling and nothing more.
Akiko Himenokouji, the main character, has a strong brother complex and harbors romantic feelings for her older brother, Akito. She longs for his attention and affection, hoping for a deeper relationship beyond that of siblings. However, Akito remains oblivious to her romantic intentions, seeing her solely as his little sister.
Their relationship is one of sibling love and care. Akiko dotes on her brother and constantly tries to win his attention and affection through various means. She is determined to make Akito see her as a potential partner. Meanwhile, Akito values and cares for his sister, but his feelings remain purely familial.
As the story progresses, three more girls, Anastasia Nasuhara, Arashi Nikaidou, and Ginbei Haruomi Sawatari, move into their apartment and develop their own respective feelings for Akito. This complicates Akiko’s quest for her brother’s exclusive attention, as she now has to contend with competition from the other girls. The girls’ affection for Akito leads to humorous and sometimes risqué situations, making it challenging for Akiko to stand out and win her brother’s heart.
1. My One-Hit Kill Sister
Asahi Ikusaba is a high school student who gets lost and ends up in another world. He has knowledge of video games and fantasy worlds, but he is weak and does not have any “cheat abilities.” He finds his older sister Mayu in the other world, and she has the strongest cheat ability and also has a brother complex.
Mayu is a very loving and protective sister, and she is always there for Asahi. She is also very strong and powerful, and she is always willing to fight for Asahi. Mayu’s brother complex is evident in the way she constantly dotes on Asahi and tries to keep him safe. She is also very jealous of any other girls who show interest in him.
