Synopsis: Only I Know That Our Innocent Class President was Once a Chuunibyou Idol.

Uchi no Seiso-kei Iinchou ga Katsute Chuunibyou Idol datta Koto wo Ore Dake ga Shitteiru. / / Uchi no Seiso-kei Iinchou ga Katsute Chuunibyou Idol datta Koto o Ore Dake ga Shitteiru. / Ch mnh ti bit rng c lp trng thanh lch ca lp ti tng l mt Idol Chuunibyou The once-famous chuunibyou idol "Nightmare of Calamity"nicknamed Meahad taken the world by storm. Reo, who used to take photos with her and post them online to make them go viral, unexpectedly reunites with her at his new high school. However, she has already graduated from her chuunibyou phase and now goes by Kanagi Nagi, the socially awkward, introverted class representative! On top of that, due to certain circumstances, Nagi is aiming to become student council president and asks Reo for help, pulling him back into producing her once again!?