The day my wife cheated on me and moved out, two former students—high school girls—showed up at my house and are trying to get in the shower.

...Calmly considering it, what kind of situation is this?

I guided the two of them to the shower room and gave them a brief tutorial on how to use it.

"Thanks a lot, Okaa-san♡ Want to come in with us~? I'm just kidding!"

The blonde gyaru, Aakari my younger sister, smiled cheekily, flicking her shirt open to flash her chest.

By the way, since they're half-breeds, Aakari's hair color is natural.

"...Stop being an idiot and just get in there quickly. I'll have some clothes ready for you."

I've known them ever since my part-time job at the cram school.

In other words, they know me well from when we were kids.

To me, it feels like reuniting with a distant relative's kid after a long time.

"Cheh~. Okaa-san is so boring~. You should let your heart race more★"

"I'll bring the change of clothes later, so go ahead and get in." I was the only one leaving the changing room.

...But just now, why did my sister Nana cry? She said she felt relieved, but...

"Ah... so that's how it is. You're together with me, huh."

The old person must have been relieved to find memories intact and exactly as remembered.

...But for her to cry over this suggests that, like me, something painful happened. A reunion after ten years apart.

However, I don't know what happened to them during those ten years.

Still... two high school girls asking to stay at a house belonging to a man they barely know. This is... an abnormal situation.

"...Something must have happened to them."

I headed toward the bedroom to prepare some change of clothes for them.

The aftermath of his mistress and wife's disgusting acts was left exactly as it was, which was incredibly unpleasant.

For now, I shoveled all the clothing, condoms, and such into the burnable trash bin.

As for the futons... I'd deal with those later. For now, I just folded them up and set them out on the balcony.

I temporarily borrowed Misae's change of clothes, grabbed a towel, and returned to the changing room. "Eh...?" "Wh-what!?"

There, just out of the bath, were Akari and Nako. "Eep……♡"

The one to immediately turn red and crouch down on the spot was Akari. "Ah, Akari, stand up!"

Nako, on the other hand, scooped her little sister up and carried her back into the bathroom.

"T-teacher... I'm sorry!"

Her older sister's voice came from beyond the bathroom wall.

"No! It was my fault... forgive me..."

"N-no, please don't mind it. Akari doesn't seem bothered either." ...Damn. I should have knocked.

But then again... things do change over ten years.

Because their insides were the same as back then, I'd unconsciously reverted to treating them like elementary schoolers.

However, their bodies, their ages—they were proper adults now.

I need to be careful and treat them with due decorum.

"My apologies. I'll be more mindful moving forward."

Through the door, I told the two of them that.

"Don't... worry about it so much. It was just an accident."

"Ugh... Akari's... lewdness." ★ Shortly after that.

I lent my sweatshirt to Nanako and the others when they came out of the bath.

As for underwear... I thought of using Misae's, but it was apparently too tight to get into.

"The old man is in so much trouble. We're going bra and pants free, y'know? Big-boobed high school girls are... eep♡ Going to be exposed~"

Akari acted as if the scene in the bathroom earlier hadn't happened.

But the tips of her ears were still burning red.

She was clearly forcing it, but she must have been embarrassed.

"...Stop talking like an idiot and sit down. I'm doing laundry right now." "Hehe. No trouble at all."

Fresh out of the bath, Nanako and the others had an even glossier allure than before.

My eyes were inevitably drawn to the swell of the sweatshirt, but they were just kids.

I shouldn't be looking at her that way.

"Ocarin... did you have yourself castrated?" "H-Wha-?"

"...A-Akari! You can't say stuff like that!"

My sister wrapped herself around Akari from behind in a bear hug.

"D-duh... I mean, she's a high school girl fresh out of the bath! She's right here in front of us! And no bra on top of that! You're not going to get all hot and bothered or something?"

"...Stupid, stupid idiot!"

"Besides, look at my tits. They keep their shape perfectly without a bra. They're terrifyingly perfect."

"Don't talk nonsense. I'm not gonna get any urges with a kid involved." "P-Perchance..."

Why am I the only one disappointed? Not just Akari, even Nana seems let down.

"Anyway, Ocarin, the washing machine doesn't seem to be working?" "Eh?!... For real?" I rushed into the changing area.

It was making a strange beep beep beep sound and had stopped.

I unplugged it and plugged it back in, but it didn't reset. "Oh no, did it break?" "...Sorry, looks like it did."

"Mmm~. This is a real pickle, isn't it?"

Akari said with a sly grin spreading across her face.

"No change of clothes to go home in. That means I'm stuck here all night~. The repair guys aren't working at this hour, either~" ...The nerve of this girl.

But honestly, she wasn't wrong.

"...Ah, Akari. Sorry about that. May I use the nearby laundromat?"

"Oh no! You're supposed to just stay silent and let it happen~ Oh my! I thought we were going to go with the flow and you'd let me crash here!" ...Akari seemed to have seen through it. Come to think of it, that's what would have happened...

"But but but, is it okay for the old man? A middle-aged guy carrying a high school girl's change of clothes into a laundromat looks suspicious to outsiders..." "I get it. Stay over." ""Huh...?"

Akari and Nana widened their eyes in unison. "I said stay over." ""R-really!?"

"Yeah... But only for tonight."

The two exchanged a glance, then embraced each other with beaming smiles.

"Yes! We did it! Big Sis won!" "...Yeah, I'm glad."

...Honestly, I had no idea what was going on.

Why these two girls came to depend on me.

What their parents were up to... no idea. But... at least this much I could say.

From the moment we met Nanaiko and the others at the entrance, right up until this very instant.

I had forgotten that my wife was cheating on me, and that my junior colleague had been sleeping with her behind my back.

"Alright then, old man, I'll cook you a meal~" "You can actually cook?"

"Of course! Oh, big sis is terrible at cooking, sadly."

"...Akari. Don't say things like that."

"So in place of cooking, I'll reward you with my body~♡ Right, onii-chan?♡" "...…"

"Eh? Just kidding, onii! Why is your face all red? Mm~?"

In the end, that day, I ended up lodging two high school girls.

But who would have thought that starting from this day, I would end up living with the two of them...? It never crossed my mind.