Chapter 2

When I opened the front door, there stood an incredibly beautiful high school girl.

A blonde gal and a black-haired, seemingly refined girl. ... Then, the gal said something outrageous.

"Hey? Didn't you hear? It's fine to do it, but can you let us stay the night?"

"......Ah, e, um......"

"......Don't tease adults. Go home."

I was about to go out, but they tried to enter the room.

"No way! I'm serious."

"Then, it's even worse. I have no intention, so go home quickly."

With a firm grip, ... surprisingly, it was the black-haired, reserved girl who held my hand.

"......Please, we have nowhere else to go......"

Her trembling voice. Her black eyes, wet with tears.

It felt like there was some serious situation.

... But, even so, it's wrong to come to me for help.

"Hey, mister... Don't you remember us?"

"Huh? What's this sudden question..."

I didn't recognize the blonde gal and the black-haired girl...

"......Mr. Okarin. Don't you remember?"

"......!"

Mr. Okarin.

She definitely said that.

"Don't you remember, Okarin? Come on... remember?"

... The blonde, cheeky girl.

The black-haired, shy girl.

I recognized them.

No... but...

"......Didn't you two used to go to a cram school?"

The girls' expressions brightened up.

"Right! [Sun Research]!"

Sun Research. That was... the name of the cram school where I worked part-time when I was a college student.

... 10 years ago.

I was working there as a private tutor.

At that time... I remember a pair of twins.

"......Ina Akari. And Ina Nanako, right?"

The black-haired girl... Nanako, smiled like a blooming flower.

"Mr. Okarin!"

Moved, Nanako hugged me.

The size of the breasts pressed against me... was completely different from 10 years ago.

Not that they were big...

"......I'm glad! You remembered us!"

"A, ah... Nanako. You've grown, haven't you?"

Height and chest.

"Hehe, you bet. I'm a G-cup, G-cup!"

"......A-Akari! D-Don't say unnecessary things!"

Nanako's face turned bright red as she shook her head.

S-So... G... big...

"By the way, I'm an F-cup, so, it's just that my sister is too big, but I have plenty of chest, so please remember that."

"......Akari. You haven't changed at all, still so precocious."

"People don't change much. Mr. Okarin hasn't changed at all since those days."

The precocious younger sister, Akari.

The gentle older sister, Nanako.

The former students I hadn't seen in 10 years...

Their bodies had grown, but their personalities hadn't changed at all...

It made me a little happy.

★

I decided to let the two of them in for the time being.

They were former students, after all.

Not complete strangers.

Besides, it was the end of summer and the beginning of autumn.

It was very cold at night.

I couldn't leave them out in the cold.

"You two, how did you know I live here?"

The girls sat on the sofa.

I... should prepare some drinks for them.

"Hehe, don't underestimate the great detective Akari."

"......I'm sorry, I just remembered."

"Remembered... Oh, right. We lived in the same apartment building since college."

After graduating from college, I continued to live in the same apartment.

"Even so, how did you know?"

"......W-Well..."

"After Mr. Okarin finished his part-time job, we used to play a game where we followed him to his house. I remembered it."

"Seriously... I didn't know that."

... Isn't that a crime?

But, it was something they did as kids...

"......I'm sorry. I knew it was wrong, but..."

"My sister wanted to know Mr. Okarin's address the most."

"......Akari! B-Baka!"

Nanako patted her sister's shoulder.

Akari showed no sign of remorse.

Ah, really... nothing has changed from 10 years ago...

It feels like I'm back in college...

"Mr. Okarin, are you crying?"

"Eh? Ah, yeah... I just felt a bit nostalgic."

The water boiled, so I made instant coffee and returned to the two of them.

Nanako bowed deeply, repeatedly.

"Here, drink it."

"......I'm sorry."

"Thanks♪"

Akari took it normally, while Nanako bowed repeatedly, trying to take the cup from me.

Pit.

"Kyaa...!"

Nanako's hand touched mine.

At that moment, she blushed and overreacted.

This caused the coffee to spill.

"Ouch!"

"Hey! Are you okay, Akari!?"

"Y-Yeah, it's fine. It only got on my cardigan and a little on my shirt. How about my sister?"

"......Y-Yeah. It only got on my skirt. My skin is fine."

... I'm glad neither of them got burned.

I sighed deeply.

"Thank goodness. My sister, reacting so much just because her hand touched her darling, how romantic★"

"......N-No, that's not it!"

"Then why is your face so red? Rub, rub."

"......Ugh."

... I'm glad they're both fine, but it could have been a burn.

"......I'm sorry, Mr. Okarin."

"No, it's fine. Just be more careful next time."

I couldn't help but fall back into old habits...

I patted Nanako's head.

"......!"

"Ah, sorry. Just an old habit... I'm sorry."

Nanako's eyes welled up with tears.

Then, she started crying again.

"S-Sorry! I didn't mean to upset you?"

"......N-No! It's not that... I just feel... safe..."

She continued to cry, saying only that.

What should I do...

"Mr. Okarin, can you show us the shower and some spare clothes? We got dirty."

Akari quickly came to the rescue.

"Ah, yeah. I'll show you the bathroom."

"Okay. Thanks. Come on, sister."