Keychain | Dandadan | Acrylic

Ghosts, monsters, aliens, teen romance, battles...and the kitchen sink! This series has it all! Takakura, an occult maniac who doesn't believe in ghosts, and Momo, a girl who doesn't believe in aliens, try to overcome their differences when they encounter the paranormal! This manga is out of this world!

After recently meeting an occult fanatic at her school who she nicknames Okarun, Momo Ayase challenges the boy to prove who's right about the paranormal. With Momo's new powers awakened during a battle with aliens from the planet Serpo, she and her grandma, a spirit medium, try to free Okarun from a curse placed on him by the Turbo Granny, an evil spirit who resides in a tunnel.

(from Fandom Dandadan Wiki)