That's a Space Alien, Ain't It?! Momo and Ken, who is then nicknamed "Okarun" by Momo, go to Momo's grandmother's house to recuperate as Momo holds Okarun's curse at bay. There, they are attacked by a monster that resembles a sumo wrestler who traps them within the property's realm. Initially believing the monster is a evil spirit, they soon realize it is actually the Flatwoods monster. Okarun forces Momo to release her powers holding off the curse to fight off the alien, which transforms him into a yōkai form that balances him and Turbo Granny...