OniAi

OniAi

Created by Daisuke Suzuki

On AT-X

20121 season12 episodes25 min6.5 / 10

A lighthearted romantic comedy harem anime centered on high school life and playful romantic entanglements, built for comfort and comedic escapism rather than depth.

Adorable young Akiko is thrilled to be reuniting with Akito, the handsome older brother she hasn’t seen in years! In fact, she might be a little too excited about living under the same roof with her precious big bro. This pint-sized cutie has a serious brother complex, and she’s definitely not interested in sharing his attention. Unfortunately for little sister, she and Akito won’t be living alone: three gorgeous girls from the student council will be along for the ride! So much for the peaceful existence Akito was craving. Big Brother the dreamy will have to stay on his toes to avoid the advances of Sis and her ravishing rivals!

Questions people ask

  • Is OniAi sad? Barely. Less sad than 88% of series.

  • Is OniAi easy watching? Yes. More comforting than 79% of series.

  • Is OniAi violent? Barely. Less violent than 78% of series.

  • Is OniAi scary? Barely. Less frightening than 76% of series.

  • Does OniAi leave you hopeful? Somewhat. More hopeful than 69% of series.

These describe how the series comes across across its whole run, compared with other well-known series. They are not a content list — nothing here was counted or checked episode by episode, so for age-suitability or specific content use a classification board or a dedicated content-warning service.

47/ 100

Cinnamon Score

How much this series gives you that nothing else will, and whether it delivers.

Familiar shape, done well.

Rarity27

How unlike any other series this one feels

Surprise72

How much more it delivers than it promises

Love46

How much audiences actually like it

The highest scores in the catalogue →

Ensemble

Like OniAi

Nearest across the full emotional profile.

Same Mood as OniAi

Nearest on what's most distinctive about this one.

Like OniAi, But Darker

Similar, pushed toward heavier and more intense.

Like OniAi, But Lighter

Similar, pushed toward warmer and easier.

Like OniAi, But Less Popular

Same territory, far fewer people have seen it.

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