高校 こうこう卒業 そつぎょう せいでしょう
kōkōsotsugyōseideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 高校卒業生

1. Probably a high school graduate.; Likely a high school graduate.

Polite
Presumptive
Conjecture