教えて！！コス姉さん

简介

An Older Girl and a Forbidden Relationship...? Misumi is a high school student who doesn't have the courage to participate in a cosplay event. While he is sheepishly lurking around the venue, he meets an older beauty with an (abnormally) strong love for cosplay, kosu-nee-san(cosplay sister)... Thus begins their daily life of "lessons"!?

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