My teenage high school romance comedy can't be this perverted!

Chapter 1: A whole new world

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Has there ever been a time where you wished to be transported into another world? To escape this reality governed by a cruel mistress called life? Cultured people would call it being isekai'd.

Oh, the magnificent adventures filled with danger and obstacles that have killed many heroes in the past. But here you arrive, summoned by the gods themselves and gifted with basically overpowered abilities as you are tasked to defeat the demon king and put an end to the war that has been plaguing their world for millennia.

Accompanied by your party members who are suspiciously all females: a princess who seeks to protect her people, her best friend who tagged along to keep her safe, a cleric who is obviously ill-suited for combat, and a mysterious woman who might be your daughter from the future. And somehow all of them somewhere along the journey fall in love with you as you save them from demons, monsters, and their own past-basically achieving the harem ending of the stereotypical eroges you might find littered around the R-18 section of any game store.

You travel along the continent slaying dragons and demons, and establish alliances with other countries. After completing many quests, saving an unending amount of villages, and collecting every single legendary weapon in existence, is when you finally arrive in front of the demon king's palace. You and your harem members through the power of love and friendship-are finally able to kill the demon king!

In the end, you become the future king, with the princess now as your queen and the others as your mistresses living happily ever after.

That is definitely what Zaimokusa's wet dreams would be like. And not that I would ever admit it, but it was definitely what my past Chuuni self would pray for every night. Ugh, the memories of my past still makes me cringe with disgust and embarrassment. Like, past me, could you not have been any more pathetic? No scratch that, it can be worse and it is worse.

Why you might ask?

Well, the infamous loner of Sobu High, househusband in training, and brother to the bestest and cutest sister in existence, Komachi-I, Hikigaya Hachiman, am now lying down in a comfortable bed...as a baby.

What!?

Why!?

How!?

At first, I thought it was a prank. My day started out as usual: Komachi nearly killing my eardrums trying to wake me up for school, eating breakfast while listening to the daily news-not that it interested me very much, but I do like to keep myself informed or at least not so out of touch with our wage-slave-creating country's current state. Okay, I was getting off track here. Anyways after breakfast, I would ride my bike to Sobu High, arrive early for my Japanese class, then join Yukinoshita and Yuigahama for club activities which mostly involves me reading a light novel or something. Nothing out of the ordinary yet, so what happened?

A white light.

That is all that came to mind: a bright flash. It was abrupt, sudden, and without warning. At first, I thought that I had fallen unconscious for some reason. It couldn't be my health, despite what others might see from afar me with my hunched posture and my stick-like limbs, I was in fact quite fit, with formed pecs and the whole package which had been the result of all the hard labor and my overly active schedule during these last few hellish months. Never tried nor bothered to show them off in the first place, unlike your regular normie who would have posted a library's worth of pictures on his profile with him shirtless on the beach-I never liked the attention in the first place. Even Komachi would complain about it sometimes. Ah, I was getting off-topic again. All that mattered was that I couldn't be physically unhealthy since I was in great shape to begin with.