I’m Dating My Ex-Girlfriend’s Older Sister, and We Have a Great Chemistry So Everyday Life Was Fun

Although it was the day of our trip.

Rina san’s health did not recover fully.

Obviously, we had to cancel the trip.

It’s immeasurable whether handing over the marriage registration helped or not, but Rina san agreed to the trip cancellation.

After the summer vacation, Rina san began to get serious about studying for the college entrance exam.

Because she set her sights on a prestigious college.

Even with Rina san’s academic ability, it would be difficult for her to pass the entrance exam if she didn’t take it seriously.

Still, we went on regular dates to relax.

When Rina sans studied, I would also study beside her.

Time passed quickly and winter came.

December 18th.

On that day, I became a little taller and went to a restaurant that I don’t usually go to.

It was worth saving up the money from my part-time job for today.

“I-is it really okay? This place is expensive….”

Rina san looked at me with concern.

“It’s okay, leave it to me.”

“B-but….”

In the first place, it wasn’t that hard to save money for today’s date, partly because I didn’t have a lot of things that I desire.

And besides, I wonder when was it that she asked me to get her something for her birthday. I put my mind to it.

“You weren’t happy?”

“No, I’m happy.”

“I’m glad to hear that.”

“Then I’m going to take advantage of your generosity, okay?”

“Please do so.”

I answered with a smile.

Soon after, the first course of the meal arrived.

Although it didn’t contain much, I knew intuitively that it was expensive.

“I think this is the first time I’ve ever eaten something like this.”

“I haven’t had this kind of food before either. I mean, is it really okay for a high school student to come to a place like this?”

“I think you shouldn’t say that, Takuto kun…… You shouldn’t be intimidated when the food comes.”

“But Rina san,  thanks to your beauty, I didn’t stand out that badly.”

“…..Tsu, T-that’s not true. You’re cool, Takuto kun.”

“…….Tsu. I’m just an ordinary high school student that you can find anywhere.”

“There are no guys like you around, Takuto kun.”

“Is that so?”

“Yeah. There’s no other guy than Takuto kun who can conquer both of Tsukise family’s sisters”

….I-it’s kind of complicated.

“Ah, just to make sure, you haven’t done anything with Yuika behind the scene, right?”

Rina san glared at me.

“I haven’t. I’m also devoted to you. I don’t have the skill to love two people at the same time.”

“Hmm. Then that’s fine.”

“What about you, Rina-san?”

“I’m devoted to  you, Takuto kun. I don’t mind showing the content of my smartphone  to you.”

“Wow, that’s a great relief.”

“Takuto kun, you can show it too, right?”

“Eh, my phone?”

“Yeah.”

The contents of your phone.

The day someone sees your search history is going to be the end of the world.

I don’t delete it because I don’t expect anyone to see it.

“I can show you if you wait just a minute.”

“What is it? Suspicious.”

“No, it’s not like I’m cheating on you or anything. Guys have secrets, too.”

“Oh, I see. I don’t mind.”

“You should !”

“I’m rather interested. Let me see it.”

“Wait, seriously, please don’t.”

Rina san’s cheeks puffed.

“I was going to use it as a reference someday”

“I-if you say that, I’ll take you seriously, you know?”

“Okay. Rather, it’s going to be troublesome if you’re too sloppy, Takuto kun.”

“Ugh…..I mean, let’s just eat already.”

“Oh, my God, you’re so quick at changing subject,”

“L-let’s eat.”

I picked up the knife and fork while my cheeks blushed.

It seems that from the outside, I look like I have manners.

I don’t know why.

Putting that aside, Rina san was also troublesome.

No wait, what’s wrong with my sloppiness?

We haven’t even kissed yet.

It’s been almost half a year since we started dating.

“Fufu…..Takuto kun, you have sauce on your cheek.”

As I silently proceed to eat, Rina san giggles.

She took a napkin and wiped my cheek.

“I-I can do it myself.”

“Don’t be shy.”

“I’m not being shy…”

“Hm? Something fell out.”

I turned my head to the opposite direction and hid my blushing face.

Rina san stood up from her chair and went to retrieve something that fell out of my pocket.

“Ah, t-that’s !”

“Hm?”

I grabbed it from Rina san.

Rina san was staring at me suspiciously.

“Was I not supposed to see that?”

“….. No, that’s not what I meant.”

Rina san is confused by my indecisive answer.”

In fact, I was planning to show it later.

Damn, I can’t decide…..

Anyway, it can’t be helped that it was already shown.

If I let it go like this, I won’t be able to concentrate on eating.

“U-um.”

“Eh, yeah.”

I started to open the conversation.

Rina san straightened her posture.

“Would you like to go with me?”

“Eh?”

I handed Rina san a pair of tickets for a trip to a hot spring.

Rina stiffened on the spot and blinked her eyes.

“You’ve been studying all the time to take the college entrance exam….. I feel like you’ve been working too hard lately. Um, so how about a break?”

“I-is that okay? I mean, I felt like I got enough birthday presents just by being invited here.”

“I was planning to make it a double surprise, but I’m sorry that I’m not very good at it.”

“N-no. Don’t apologize. I’m so… happy.”

When Rina san received the ticket from me, she scratched her cheek embarrassedly.

I’m glad she liked it.

Because we couldn’t go to a trip during the summer vacation.

“H-hey, isn’t this for Christmas?”

“That’s right, was it a bad idea? I thought I asked you in advance to clear your schedule for Christmas.”

“Ah, no, I’m fine.”

“I’m glad to hear that.”

I’ve made the reservations in advance.

Well, it’s Christmas and my family will be suspicious of me, but……

My younger sister doesn’t seem to have a tact, and I’m afraid she’ll ask me about my love life, but let’s not think about such troublesome things.. Yeah, that’s good for my mental health.

Rina san gazed at the ticket intensely.

“I should prepare myself, right?”

“Hm !? No, no, I….don’t know. I didn’t ask you to go on this trip with that intention.”

“Even though you go out of your way to choose Christmas?”

“….Y-you’re so mean, Rina san.”

Rina san has a teasing smirk on her face.

I’m no match for her.

“Oh right.”

“What is it?”

Suddenly, Rina san raised her voice as if she remembered something.

“This time, I’m going to reward you,  Takuto kun.”

“Oh, come to think of it, there was.”

During the summer vacation.

I was told that if I finished my homework before the trip, I would get a reward.

In the end, we didn’t go on the trip, so the reward had also spontaneously disappeared.

“Takuto kun, you’ve done so much for me, I have to repay you properly.”

“No, don’t worry about it. I do it because I like it.”

“I do it because I like it too.”

“Is that so? Then I’ll look forward to it.”

“Yeah.”

Rina san’s smile blossomed and she lowered her head.

A lot of things have happened, but my relationship with Rina-san doesn’t seem to end.

I think we have a good chemistry, whether it’s because we share the same values, or that  that we have the same sense of humor.

From now on, I want to be with Rina san.

I even seriously think that I want to marry her.

Me and Rina san’s child would be absolutely adorable.

It would be fun to experience many things with Rina san.

“And, oh right. I’d like to say something to you, Takuto kun.”

“What is it?”

Rin -san waved her index finger and told me to lend her my ear.

When I lend my right ear, Rina san brings her face closer.

She kissed me on the cheek.

“You’re open.”

“P-please think about the place first.”

“Would you have preferred my lips?”

“That’s not what I meant !”

As usual, this girl…..

“I love you, Takuto kun.”

I love you too, Rina san.”

She smiled softly and conveyed her feelings straightforwardly.

I also told her how I felt about her straightforwardly.

If I’m with Rina san, I won’t get bored no matter how old I get.

For now, it’s a trip to the hot springs.

I have no idea how it will turn out, but, well, I’m going to enjoy it.