時代の流れに背を向け、世に眠る無数の深き秘を明かすオカルトサークル――。
二人で一つの「秘封倶楽部」は、今、科学世紀の扉を越えて活動を始める。

An occult circle that turns its back on the flow of time and uncovers the countless deep secrets that lie dormant in the world.
The "Hifuu Club," a group of two, now begins its activities beyond the door of the Science Era.