Teach Me!! Cosplay Sister

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"!?