After Being Betrayed by My Girlfriend, I Kiss Her Little Sister

Cheating and Encounter (1)

It’s December 24th—Christmas Eve.

I…Kanata Miyauchi, just saw my girlfriend, Umi Kitagawa, cheating on me. Umi told me that she would be busy on Christmas, so we agreed to have our Christmas party on Christmas Eve instead.

But…

As I finished shopping at the mall, I catch a glimpse of someone I know very well.

She is holding hands with a man I don’t know, laughing happily—then, right in front of me, she hugs him.

It’s Umi…

“……”

At shock, I drop the bags I’m carrying.

I can’t believe what I’m seeing. I have no idea what to do.

It’s the first time I’ve experienced something like this, so all I can do is go straight home.

Not long after, I receive a message from her.

“It seems like I’m also busy tonight! Sorry!”

She doesn’t even give me time to process what just happened.

Cheating…no matter how I look at it…Umi is cheating on me.

Just like that…our entire year together is wasted.

For some reason, that’s how I feel.

But still…at the very least, couldn’t she have told me why she was so busy? We’re childhood friends, aren’t we? We’ve been really close with each other since we’re little, aren’t we? So why…why did you break our promise so easily?

The guy standing next to her…I have no idea who he is.

Why…why is she hugging some guy I don’t even know…? Umi…

Before I knew it, tears begin to stream down my face.

I don’t even realize that I’ve been standing at the entrance of my house this whole time, silently crying.

How did it come to this?

I don’t know.

No matter how much I think about it, I just can’t seem to get it.

Someone…someone, please explain it to me.

“Ugh…”

Christmas Eve…feels like hell.

The girl I love…is out on a date with a guy I don’t even know—

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

December 25^th, Christmas Day.

“I can’t believe winter break starts on the 26th…seriously? I don’t even want to get up today. I just want to stay in my room, buried under my blankets all day…”

“What’s wrong with you this morning? You look…kinda awful.”

“Kisaragi, huh…”

“W-What…? Did something happen? Oh, right…where’s Umi-chan?”

…ah, yeah. That’s right.

She was always by my side, always here with me.

But today…she’s not.

“Can I talk to you for a second, Kisaragi?”

“Hmm? Yeah, sure.”

Her name is Touko Kisaragi, back in out first year of high school, she helped me with my studies. I’ll always be grateful to her for that.

That’s how it all started, and now she gives me advice on all sorts of things. Even Umi, who usually doesn’t like me getting close to other girls, trusts Kisaragi. Because of that, we get along well. Kisaragi is also the one who helped me figure out how to deal with my discomfort around girls.

I have always been awkward around girls, even with Umi, my childhood friend.

But with Kisaragi, I don’t feel awkward at all.

As expected, extroverts are on a whole different level.

“So? What is it?”

“Ah…I just want to say…thanks for everything, Kisaragi.”

“What are you talking about? Are you going to die tomorrow or something, Miyauchi-kun?”

“What—? No, why would you even think that?”

“Ahaha, just kidding. You look pretty down this morning, and now I get it from what you just said. You had a fight, didn’t you? With Umi?”

“T-That’s right.”

No, I can’t.

Even if it’s Kisaragi, she’s still Umi’s friend. I can’t tell her about what happened last night.

“Then how about we go to karaoke today?”

“Thanks…but I’m good. I think I’ll just head home today…ah, let me treat you something from the vending machine, though.”

“Sure, but hey, don’t make that crying face just over a little fight. You’re a guy, aren’t you?”

“…yeah.”

That’s right…if Kisaragi didn’t come up to me and listen to what I have to say, I probably would’ve just sulked in the corner of the classroom all day long.

I’m really glad to have a friend like her.

“Don’t worry about it. I’ve been watching over Miyauchi-kun since our first year. It might be tough right now, but I’m sure you’ll make up with her soon!”

“Thanks, Kisaragi…”

“Fufufu.”

Just as I’m about to enter the classroom, Umi comes walking towards me.

Right, I have completely forgotten, but…we’re in the same class, aren’t we?

I don’t even have time to figure out what kind of face I should make—Umi is the one who greets me first. For now…neither of them knew about what I saw last night.

Even so, my heart hurts like hell.

Umi greets me with her usual smile…but I have seen it.

I haven’t done anything wrong. So why…? Why did she cheat on me with some guy I don’t even know…?

Unfortunately, I’m not mentally prepared to face this yet.

“See, Umi-chan greets you first, doesn’t she? Cheer up, Miyauchi-kun!”

Kisaragi pats my back as she said so.

I watch Umi’s back as she walks away, completely unsure of what to do.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

“Hey, about Umi-chan…if you talk to her, I’m sure you’ll be able to make up! I spoke to her a little earlier, and she didn’t seem that upset.”

“You think so…?”

“Cheer up! If anything happens, you can always come to me.”

“Thanks, Kisaragi.”

“Of course.”

After the homeroom ends, I part ways with Kisaragi in front of the school gate.

I don’t have any plans, but…it’s Christmas, a day that only comes once a year. I feel like Kisaragi should spend the day with someone she likes or with her friends, rather than wasting the day with someone like me. So, I turn down her karaoke invitation.

Yet…my heart still aches.

I tried to forget about what I saw last night—over and over again, I really tried. But there is no way I can just erase what I saw so easily…

At least, not for me.

I guess I’ll just head home, eat the cake I bought yesterday, and spend the rest of winter break reading manga.

That’s all I can do. There’s nothing else left for me.

“Ah—!”

As I walk, I accidentally bump into a girl on the street.

Where the hell am I even looking…?

“S-Sorry…”

“Ah…that hurt…”

“A-Are you okay?”

The girl who has fallen on her bottom is staring at me.