It's All Your Fault, Vol. 1 (manga)

It’s All Your Fault manga volume 1 features story and art by merryhachi.

Shiho is a troublemaking otaku aiming to create the most perfectly accurate costumes. Yotogi is a popular cosplayer with over 200,000 followers who is known for her revealing outfits. These girls are like fire and ice, clashing as they strive to become superstars in the world of cosplay!!