is a Japanese manga series written and illustrated by Merryhachi. It was serialized in Shueisha's manga magazine Ultra Jump from June 2022 to February 2025, with its chapters collected in five volumes. The series follows Shiho Kumai, a passionate manga and cosplay enthusiast who befriends popular cosplayer Yotogi after defending her from harassment, only to discover Yotogi's provocative "exposure cosplayer" style clashes with her own conservative views on the hobby. The series has been licensed for English release in North America by Yen Press.
, an avid manga and cosplay enthusiast, intervenes when she witnesses a woman being harassed at her university. The woman is revealed to be , a popular cosplayer with over 200,000 followers on social media. After their encounter, the two collaborate at a cosplay event. Shiho initially believes she has found a kindred spirit, but soon discovers Yotogi is an "exposure cosplayer"âÂÂa type of performer Shiho strongly dislikes due to their revealing costumes and provocative content. The two clash over their opposing views on cosplay, with Shiho's reserved nature conflicting with Yotogi's bold, boundary-pushing approach. As their interactions continue, their relationship evolves, exploring personal boundaries, differing subcultural values, and the challenges of finding common ground despite contrasting perspectives.
Written and illustrated by Merryhachi, It's All Your Fault was serialized in Shueisha's manga magazine Ultra Jump from June 17, 2022, to February 18, 2025. Shueisha collected its chapters in five volumes, released from December 19, 2022, to March 18, 2025.
In North America, the series has been licensed for English release by Yen Press.
Writing for Anime News Network, Lauren Orsini described the story as centering on cosplayers with exhibitionist tendencies, calling it unique, but noting its underdeveloped romance and potentially off-putting humor. MrAJCosplay criticized its lack of thematic clarity, finding its conflicts about cosplay culture intriguing but unresolved, making it most suitable for readers already interested in cosplay themes. Darkstorm from Anime UK News praised its nuanced portrayal of authenticity versus self-expression in cosplay, though criticized early consent issues and sparse backgrounds.