Yunyun Syndrome!? Rhythm Psychosis, the psychological rhythm adventure co-developed by Alliance Arts and WHO YOU, drops the beat with its first-ever demo debut during Tokyo Game Show 2025. Meet the creator of Yunyun Syndrome and experience the first hands-on opportunity at the Alliance Arts booth located in Makuhari Messe, Hall 1, C07. All are welcome to try out the demo. In the demo, witness the beginnings of brainrot as protagonist Qtie experiences parasocial obsession to the highest degree. Declare love for her coveted Yunyun — a mystical online persona that might not even exist — by degen-posting across social media and clacking her keyboard to the beats of ten songs playable at Tokyo Game Show, with more than 30 denpa songs to be included at launch. The perils of the real world have turned Qtie into a shut-in, but her escape from life's troubles may prove more tumultuous than expected. Embrace her chronically online behavior and proclaim love across social media for Yunyun, spreading fandom across the internet and dunking on the haters. Somehow, this may lead to the destruction of Earth itself…but all is fair in love and (keyboard) war. Join the official Discord server for information about the upcoming closed beta test. Yunyun Syndrome!? Rhythm Psychosis arrives on PC via Steam this Winter. The debut demo will be playable at Tokyo Game Show from September 25th to 28th, 2025. Alliance Arts’ booth is located in Makuhari Messe, Hall 1, C07. Yunyun Syndrome!? Rhythm Psychosis will arrive on PC via Steam this Winter with support for English, Japanese, Korean, Simplified Chinese, and Traditional Chinese language options.