Osananajimi 

A commonly-used term in romantic anime, an osananajimi is a friend from infancy, a childhood friend or old playmate with whom one shares the special and intimate understanding that (according to such stories) can only come from having known each other since earliest childhood.

A good example of Osananajimi is Manami Tamura from Ore no imouto

Osananajimi by Edgar4815 November 9, 2010

osana najimi

osana najimi Is a character from yandern simulator. She is a rival who try’s to take taro from ayano

Ayano: you stole senpai
Osana najimi : you got a problem with that

Taro: ? What the ?

osana najimi by 123dog13 April 27, 2021