Ep. 40: The group heads to a physics research facility to stop K from opening a monster gate
Aired on September 17, 2016

K attempts to open another monster gate, prompting the gang to intervene and prevent his plans from succeeding. They travel to a physics research facility to stop him. Meanwhile, Taiyo and Shino join forces to search for clues related to the situation. The team works together to counter the threat posed by K's actions at the facility.
Episodes
- Ep. 36 · The Imprisoned Lily: I will not let you have Haruma...
- Ep. 37 · Ryoma in Darkness Urges Haruma Kagutsuchi to Regain His Senses
- Ep. 38 · K Reveals Himself as Genma and Explains the Warrior Gods' Connection to Kaminohara
- Ep. 39 · Akira and Haruma seek to apologize for past actions at the hospital
- Ep. 40 · The group heads to a physics research facility to stop K from opening a monster gate
- Ep. 41 · XFLAG PARK: Off-the-Charts Performance!
- Ep. 42 · Haruma searches for Shino in Kaminohara while Ren and friends encounter a giant snake.
- Ep. 43 · An Offering to Orochi: Dance until you break!
- Ep. 44 · Past Ends as Monster Strike Infiltrates Reality Following Kushinada's Defeat