Is it Wrong to Summon Heroes?

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Adventurer: Why are there so many killer ants in Orario?!

Adventurer: Stop complaining and swing your sword! Make sure that their fully dead or they'll call in more of them!

Adventurer: Aaaagh!

Many Adventurers in the city are fighting the horde of killer ants that bursted from the ground, but the number of them is slowly overwhelming the Adventurers.

Eina: Please follow our directions towards shelter! All Guild personnel will direct you towards the safest location!

Misha: Eina, the Adventurers can't hold them off. There too many of them and the ground they come from keeps pouring them out.

Eina: What about Loki Familia and Freya Familia?

Misha: They're doing their best to reach the center, but these killer ants are different- like they were strengthen... All of them.

Eina: Strengthen monsters of this size. I fear if this the Dungeon is finding ways to lead the monsters escape Orario...

Suddenly, one of the enhance killer ants got passed through the walls of the Adventurers and charge towards Eina and Misha.

Misha: Eina!

Eina didn't enough have time to react as the killer ant open its jaw to crush her head.

Before Eina can have her life flash before her eyes, an arrow pierce the ant's magic stone, turning it into ashes.

Eina: ...What?

And not for long, a rain of arrows descended from the sky as the killer ants die one by one. The last arrow pierce the monster's core, killing the last one in the vicinity.

Adventurer: What the heck!?

Adventurer: Who did that?

Adventurer: I don't care since they help us clear all of them out.

Misha: Eina, are you ok!?

Eina: I'm fine... But, who did that?

Up on Babylon, Arjuna sees the whole city. Arjuna prepares another arrow to rain on the monsters. Arjuna release the arrow and the arrow splits into thousands of it and descend upon the monsters.

The monsters didn't have time to do anything as their core was destroyed, pierce by the arrow and all of them turn into ashes. 

Allen: There's an archer like that in Orario? Who the hell is that person.

Ottar: ...Let's go. The archer is giving us supportive fire. Charge towards the epicenter.

Freya Familia: Yes!

The executes of the Freya Familia and the Adventurers head towards the hole.

Shakti: Everyone, head towards the epicenter! We will not waste this chance the archer has given us! Go!

Ganesha Familia: Oooohhhh!!!

The Ganesha Familia charge to contain the killer ants and bring order to Orario.

Finn: Status report.

Raul: The situation was dire before the mysterious archer helped us. But, I don't know how they are able to fire countless arrows that all hit the magic stones in them. That requires a lot of calculations to hit all of them, or they're lucky.

Finn: Whatever it is, thanks to them, they clear out all of them that are far away from the epicenter. Now we can focus on the monsters that are pouring out from the hole. Get everyone to head towards the hole and contain it. We'll wait for Hephaestus and Goibniu to bring in the items to cover the hole.