This story reminds me of my past self. I read a biology text book for high school (the chapter about sex & genitals) when I was still 4th or 5th grader. Yeah I am a curious fella.
'The Edge of Tomorrow' was an adaptation of this story with slightly different endings.
https://en.m.wikipedia.org/wiki/Edge_of_Tomorrow
Read at 'based on' part.
I like this anti mainstream manga. It's treachery way beyond the Konosuba ever was. The MC and FMC were scum on equal footing. By reading this manga, I feel scummier each day.
To alleviate the effects from spicy condiments such as pepper, wasabi, etc, you can just brush your teeth with toothpaste, and don't forget to clean your tongue too.
This manga and this:
https://mangadex.org/title/59546/ikiri-yuusha-wa-sukuenai
And this:
https://mangadex.org/title/58192/isekai-yuusha-mizuki
Is the year 2021: the rise of scumbag heroes?
This manga and this:
https://mangadex.org/title/46063/nise-seiken-monogatari-osananajimi-no-seijo-o-uttara-michizure-ni-sareta
And this:
https://mangadex.org/title/58192/isekai-yuusha-mizuki
Is the year 2021: the rise of scumbag heroes?
With that kind of motivations, if the plot twist were: to enhance/amplify their power, the hero and saintess have to be together, then they're screwed, big time.
Page 34: What? It's really a slapstick comedy here. How can he mistaken the way the trigger's facing.
Page 40: Battle Cruiser operational.... Yamato Gun is charging.....
By the way, that kind of rocket launcher also appeared on some games like Resident Evil or Alien Shooter.
Reference...