Mitsuha's deceased big brother has a room that Mitsuha kept as a very important memory until to this day. The craftings that her brother did, the various hobbies and collections. The boxes in the room contain many fun toys and Mitsuha found a pair of police caps in it.

"And this… is how I become a cop." Mile is playing with the police siren and cap, however, she doesn't expect that Kaoru would put her police cap on too.

"I refuse to believe Mitsuha is innocent so I've given myself permission to search this place of incident." Kaoru willingly wears the police cap Mile gave her. "I announce that the isekai police will establish here and now!"

"Oh, oh!" Mile goes along with the hype not knowing why Kaoru is motivated to search Mitsuha's place all the sudden. "Wait, what are we looking for exactly…"

"Anything suspicious of course. Don't you think Mitsuha is very sus?" Kaoru uses her item detector, it's made from her potion ability. "She's afterall the only one who can travel across worlds… which means that must be something she's hiding."

Mile nods, not knowing what Kaoru means to be exact still. "Like something she wishes to hide?"

"Something she wishes to hide, yes!" Kaoru fires up her detector. "There it is! Behind that box!"

"Yes, ma'am!"

A long sealed box, when Mile opens up she looks confused. Kaoru's face changes from excitement to emotionless stare. She notices Mile isn't aware yet and she steadily closes the sealed box they pull out before.

"What's the matter? What is that long plastic thingy?"

"Mile, as pure maidens, we need to condemn the use of it and do not even think about it." Kaoru crosses her arm. "That's the source of crime!"

"Guilty?"

"Guilty!"

Seemingly avoiding her way to explain that thing to Mile, Kaoru relieves as Mile plays around with her police siren sounds. Then the door busted out and what they saw shaken them.

"Who gives you permission to enter my big brother's room?"

"Mitsuha?!"

Two uppercuts to both protagonists, Mistuha isn't showing any mercy as she K.O them both before dragging the girls out of her room. She then brings on planks to seal off the place, her hammering on the nails are paired with anger.

(Knock! Knock! Knock! KNOCK! KNOCK!)

"Hey… isn't she a bit more than just mad…" Kaoru asks, she has used potion to cure her pain.

"It's her brother's room… her family is… well gone in an unfortunate incident." Mile being the strong girl here, she is hard enough to not feel pain physically but emotionally. "Also, she loves her brother so going in there is probably not the brightest idea."

"..." Kaoru is speechless. "Then why didn't you mention it before?"

Mile is thundered, her clumsiness is full on display. Now using her Mile's tactics, she chooses to pretend dumb. "Ei-hey~"

"Hey you two." Mitsuha calms down, her tone is back to normal.

"Yes!"

"Yes?"

"Before I figure out how to bring you back to your world, you'll have to live in my isekai world. I can't risk two dangerous girls interacting with my modern world." Mitsuha makes her case and just before Mile and Kaoru want to counter her argument, Mitsuha pulls out her powerpoint slides as projected on the wall.

"Mile, humble innocent girl with "average abilities" rivaling dragons and even more. Capable of casting magic, item box, basically a dragon level threat."

"Hey… uh well, it's true… yeah." Mile accepts her defeat.

"Kaoru, even worse, creates potions that she can think of in anything she likes. The only limit is not too overpowered stuff that is in pair with the goddess's power… which means… you're almost for certain a goddess for other people."

"Ah…" Kaoru goes down without a fight.

"See? Imagine what kind of destruction I may bring if I let you two here. It's not worth my risk." Mitsuha smiles as she announces her complete victory.

"Hey, then why don't you just send us back? You can travel across the world right?" Mile raising her hand like a student.

"I wish I knew how to do it. I have tried it but it… didn't workout the way I envisioned it. There is an infinite amount of world out there and if I get lost, it is game over for me." Mitsuha sighs. "Anyways, can you please come out now, my guest?"

"This girl just appeared in my bathroom and scared me?!"

"Yuna?!"

The girl from the bear series, the slice of life, isekai genre story that both Kaoru and Miles know. Mitsuha with mixed feelings on her face. She has already decide not to just simply travel to random world after accidentally dragging Yuna into her world.