MTL - Great Voyage: The Cartoonist of the Straw Hats - Chapter 53

A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

Viserys Targaryen was born with the blood of dragons and yet lived his life in exile. He was a prince with a lost kingdom and a fading legacy, an immature bastard who died a pitiful death. Unfortunately, that same death was coming for me now… as I found myself in his body right before molten gold fried my brain.Yes. Fuck Khal Drogo, and fuck the molten crown.With the memories from another life, in this world of betrayal and broken oaths, I had the chance to forge a new destiny for myself. Armed with the knowledge of the future, my own cunning, and [The Dragon System], I made the choice to flee from the Dothraki barbarians and take back what was rightfully mine.

'Nina?'The thought hit me before I even really processed who it was. Nina Shoka from my class. She was just walking along, probably listening to music, totally unaware that this car had lost control and was sliding right toward her.I didn't think about it. Didn't weigh the pros and cons or consider my options. My legs just started moving.I dropped my phone and sprinted toward her. The car was maybe three seconds away from hitting her when I slammed into her side, pushing her as hard as I could toward the sidewalk.She went flying, landing hard on the concrete but definitely out of the car's path.Me? Not so lucky.The impact felt like getting hit by a train. One second I was pushing Nina to safety, the next I was flying through the air. Then I hit the ground and everything went wrong at once.I couldn't move my legs. Couldn't really move much of anything, actually. There was this weird warm feeling spreading across my chest and stomach, and when I tried to breathe, it felt like drowning.'Well, this sucks,' I thought, staring up at the sky. 'Guess that's what I get for being a hero.'My vision started getting all swimmy and weird, but I could make out Nina crawling over to me. She had pulled out her earbuds and there were tears streaming down her face.“Why did you do that?” she kept asking, over and over. “Why would you do that?”I wanted to shrug, but my shoulders weren't really cooperating. It seemed pretty obvious to me - she was in trouble, so I helped. That's what you do, right? Nothing fancy about it.She was talking to me, saying my name a lot. I didn't realize she even knew my name, to be honest. We had been in the same class for like three months and I don't think we had ever actually had a conversation.“Kofi, stay with me, okay?” she was saying. “You're gonna be fine. The ambulance is coming.”