The Strongest Interstellar Commander - Chapter 35: Nuclear Fusion Reactor Activation.

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

I seem to have reincarnated in the world of an r-rated romance fantasy novel. And not just as an ordinary character, but as the witch who loses her life to the crazy male lead!

Luckily there is a long 200 years until the main characters are born and grow into their roles.

Now that my life is not in imminent danger, shall we leisurely think of ways to avoid death?

However, I had not taken notice of a very important detail about the time I’d be spending ‘safe from imminent danger’. 200 years was by no means a short waiting period and by the time the younger version of the male lead appeared in front of me , I had completely forgotten the original novel’s plot!

Oh, whatever, now that it’s come to this, the only way to survive is to raise the male lead into a sane and stable adult! The first step to avoiding death by the hands of the tyrant male lead is changing this extremely frightened child’s life.

“It must be very inconvenient for you to have me suddenly show up on your doorstep, I’m sorry. You can tell me to go away, I’ll be fine.”

“Nonsense. Do I look like someone who could be inconvenienced by a little boy like you? Also, what do you mean by you’ll be fine even if told to go away? It’s not like you have anywhere to go back to, kid.”

The little boy burst into tears.

‘Oh, this is so not it.’ Was what the witch thought to herself as the little boy sobbed

"What you do in life, Echoes in Eternity."

The System, who goes by the code name, Thirteen, defied the System God in order to give his previous Hosts’ the chance to change their Fates.

Unfortunately, he was killed by his Father, the System God, and was sent to the world of Pangea to struggle like the Cannon Fodders that he fought so hard to protect.

Armed with his knowledge as a System, Thirteen vowed to change not only his Fate, but the Fate of others whose destinies were tied up with him.

In a world torn by power and corruption, a fallen System will bring out a symphony of change, or lead it to its destruction.

From a caste based high school, bottom-tier Naomi Masatsugu is caught up in a summon of his class to a different world. However, as soon as they arrived the king said, “This guy is unnecessary because he only has clumsy skills ” and it is concluded that he is to be forced to administer the orphanage, which no one wants to do. Unfortunately for the orphanage his skills were cheat skills that cause the girls to cling to him.

In order to “defend” the girls that depend on him, he must operate the orphanage while overcoming the powerful people, authorities, and former classmates that surround him.