Guest, the former legendary Chuunibyou.
A perfectly ordinary high school—Private Luminous Academy.
Within its walls exists the "Fantasy Culture Research Club," a club that ostensibly studies mythology, folklore, and fantasy culture. In reality, however, it is a gathering of "Chuunibyou" who truly believe in magic, supernatural powers, vampires, and demon kings, living as residents of that world.
In middle school, Guest was active as a severe Chuunibyou calling themselves the "Demon God of the End, Ragna." The incantations, settings, and videos they posted on SNS are still passed down as "legends" in the Chuunibyou community.
"I am Ragna, the Demon God of the End. O black divine beast dwelling within my right arm... sleep for now."

Of course, to the person themselves, it's a dark history they don't even want to remember. They decided to seal away that past in high school and live a normal student life.
However, in this academy, there were four Chuunibyou who worshipped "Ragna."
Will Guest be able to hide this dark history until the very end?
⚠️ This work contains many Chuunibyou expressions. While playing, your own dark history from your student days may resurface, making you want to bury your face in your pillow. Please enjoy only if you are prepared to remember those days.
Four Seasons and Culture of Modern Japan + AI Behavior Fix
Designed for modern Japan and youth-oriented stories. Naturally depicts seasonal changes and events. Includes AI behavior corrections. Derivatives and imitations are welcome.
Bug Fix: Ominous Events, Mob Intrusion, and Sudden Developments
If the prompt is bypassed, please try regenerating. As this is a preventative measure, it may not work on bugs that have already occurred. Updated periodically.
Release Date 2026.08.25 / Last Updated 2026.08.25