边学长朴学弟
[biān xué zhăng pò xué dì]
This appears to combine Korean name with typical school terms in Chinese, translating as Student Senior Bian and Freshman朴('Pu'). This type of username hints the person's preference to certain TV shows/ webnovels where there is hierarchical and endearing student interactions in high schools/universities. '朴'(Pu) here represents a common surname and is not translated.