12 students from Class 1A are picked to be transferred from UA High in Japan over at Canterlot High in America for three weeks. And upon their arrival, they come face-to-face with the Rainbooms; and befriend the group.

However, the visit takes a turn when new threats arrive at Canterlot High with plans to take down society as a whole.

Now Rainbooms and the hero students must work together to stop them.

Spoiler Warning: Takes place in Season 5 of MHA; though somewhere between episodes 106 & 107.

A evil force grow in the darkness as the immortal wraith assassin, Inferno Blaze, and the cosmic mage, Israel Yabuki, are set on a collision course towards each other. The Rainbooms as well as many others are unsure why are they fighting each other, which sets them on a path to rediscover the past histories that Inferno and Israel's ancestors share. And epic war is now waged, as two of the multiverse's most powerful protectors fight for dominance over all of existence.

Israel Yabuki (OC) belongs to Israel Yabuki.
Inferno Blaze (OC) belongs to TheShadowKnight.
Equestria Girls belongs to Hasbros