After returning from the headquarters of the organization, Futaba and I took a day off from school.

We could have gone to school in the afternoon, but I didn’t want to let Futaba go to school after seeing and experiencing so much battle which even damaged her mind and body.

She is now sitting on my bed side by side with me.

I hold Futaba’s shoulder as she rests her head on my shoulders and slowly head my little sister’s body with healing magic.

It seems like there won’t be an aftereffect on Futaba but we can never be too sure.

「Warm……Oniichan, you were that strong?」

「Yeah」

「Since when? You promised to tell me.」

「I will but you might not believe me.」

「I believe you. I’ll believe anything you’ll say after seeing how powerful you are.」

I gave Futaba the same explanation I told Yui.

I did not say that I’ve lived until I’m around 40 but I did say that I’ve returned from another world.

「Isekai…….that’s…..but considering that oniichan is a singularity, that might be possible…..」

「You believe me?」

「Yeah. I’ve decided that I’m going to believe you no matter what you say.」

「I see. Thanks.」

「Do you think it’s strange?」

「Yeah」

Futaba nodded with a puzzled look on her face.

「I see. You’ve grown up as a good girl.」

I patted Futaba’s head.

「Don’t treat me like a child too much….」

「If it was the former you, you would have shaken off my hands already. You’ve become more rounded.」

「Ugh……I didn’t want to get too close to oniichan before because it will slow me down when I’m protecting you. However, I’ve always wanted us to get along.」

「I see. I’m sorry you had to go through that.」

「Mou, don’t talk like we’re an old married couple.」

「Eh? Do we look like that?」

「I’m just kidding.」

Why does Futaba look a little embarrassed?

She’s not reacting like that because of the words “married couple”….right?

That can’t be.

「Hey Kazu! Are you okay!?」

Then, Yui, in her school uniform, jumped through my window.

She came straight from school?

「Ah, you two, what are you doing in bed……?」

Yui pointed at us with both embarrassed and angry expressions on her face.

「I’m the one who wants to ask you. Don’t enter through the window. Are you the childhood friend from the showa era romcom?」

「There are heroines like that even in heisei era so you don’t have to worry.」

「That’s not the point.」

「Stop that! You shouldn’t come into other people’s house without permission!」

Futaba forcefully interrupted my and Yui’s conversation.

I’m not sure why the two of them just can’t get along.

While soothing Futaba, I asked Yui.

「What do you mean by “are you okay”?」

「Ehto….」

Yui glanced at Futaba and stammered.

「Don’t worry. Futaba knows everything.」

「How could she…..ah…..I see…..」

Yui seemed to have guessed everything with just those.

She’s as smart as always.

「I heard that “someone” attacked the Japanese organization and told them to “Stay away from the singularity”. That means something must have happened to Kazu.」

「You heard it quite fast.」

It’s been less than two hours since Futaba and I left the headquarters.

「The Nordic organization has a spy or two in their ranks. From that looks of it, you must have gone on a rampage.」

「As expected of Yui. So edgy.」

「I’m not edgy! Maa, if you’re going to do something like this again, call me too, okay?…….After all, I’m your partner.」

「I’m sorry but I’m going to be oniichan’s partner from now on.」

No, you don’t have to compete with her in that aspect.

「As the little sister, I can be with oniichan 24 hours a day.」

「I don’t see the point of having a weak little girl sticking around him.」

「If it’s just a simple comparison in strength, I don’t think either of us are any better than oniichan. I think my special ability is more beneficial to him.」

「What do you mean by “special”?」

「Do you think I would tell you?」

「Kuh~! Then, I’ll move in here with you!」

「Why would you do that? You two, calm down.」

I released a little magic power for a moment to intimidate the two of them.

「「Yes……」」

The two of them sagged.

「You two mean a lot to me so please, be good friends.」

「「You mean two-timing?」」

「Why did it suddenly turn into a strange topic! You, friend! You, little sister!」

「「Eh~?」」

「You two are pretty close already.」

Also, it’s an undeniable fact that Futaba is my little sister.

Even if it’s only adopted.

「Maa, so be it. Now that I’ve confirmed that Kazu is okay, I’ll make you two something to eat.」

Yui grabbed her shoes in her hand and was about to exit the room.

「That’s my job—」

「Futaba-chan, you have to get your body healed first. Just get yourself be pampered today.」

「Ugh……I don’t need your permission…..」

「I’m not going to ask you to thank me. You can get back to me at the next joint junior and high school leader camp.」

After that, Yui exited the room while humming.

She noticed that Futaba’s internal magic circuits were damaged by the chief’s attack.

Since she was able to see someone’s condition without touching her, I’d say her training is paying off quite well.

「Oniichan, have you been selected for the Leader Camp?」

The joint junior and high school leader camp is an annual event held jointly by my high school and Futaba’s junior high school, which has a sister school affiliation with my high school.

It’s an attempt to pick up students, who are potential leaders, from each school and enhance their qualities during the camp study.

「No, I don’t think it has been decided yet.」

However, Yui will probably be chosen.

「Was Futaba chosen?」

「Yeah…..I’ve got some work to do at the shrine so I thought of turning it down….」

「I don’t think you have to worry about that anymore. Why don’t you join?」

「But……」

「You don’t have to be worried about me anymore. I’d be happy if Futaba experiences various things.」

「So, you want me to find a boyfriend there?」

「No, it’s too early for that. Go find someone stronger than this oniichan of yours.」

「I’ll never find someone stronger than you!」

Don’t say that so happily.

「However, thinking about it, I also have to repay my debt to Shiratori-san.」

「I guess you should.」

In her previous life, Futaba used her entire life to protect me.

Now it’s my turn to protect hers.

To do that, I need to show her that I’m happy too…..

This task is more difficult than defeating demon gods. I’m not really good at this.

TN: Next chapter is the start of Chapter 7 – For Me, It’s a Lukewarm Camp.