彼ほど平々凡々たる主人公は珍しい。

tbd

A protagonist as plain and ordinary as him is rare indeed.

さまざまな才能に恵まれて、なんでもそつなくこなす姉にとって、平々凡々たる俺の存在はひどく許せないものらしい。

tbd

For my multi-talented sister, able do anything with ease, it seems that my commonplace self is something whose existence she finds very hard to forgive.