Toaru Majutsu no Index - Volume 1, Chapter 3: The Grimoire Peacefully Smiles. "Forget_me_not."

Batman: “You can't deny that your brother, Superman, brought about Zod. The two of them battled and nearly destroyed half of Metropolis. Countless people perished in that disaster—do you want to take a look at the list of casualties that could drown a person?”David: “He was adopted.”The Flash: “Why don't you step up like your brother and lead the heroes on the front lines to protect the world?”David: “I don't possess the same kind of power as he does.”Wonder Woman: “Are you saying that when Superman was punched by Doomsday, you would've gone up there and given Darkseid a round of military combat?”...Transcending into the DC world, David finds himself becoming the newborn son of Superman's foster parents, gaining the Thanos template at birth. Moreover, by influencing the emotions of plot characters, he can accelerate the fusion of templates and unlock new ones?The Hephaestus template—loaded. The template of a million stellar sentinels—loaded! The template of the divine Celestial Arbiter Arithm—complete Phoenix Force template, Golden Planet Devourer template...

BL manhua artist, Ti Xiao, has been single for many years. As such, he is under constant pressure to find a partner and get married. His family’s little niece shipped him together with her school’s English teacher to form a CP. The editor at work also want to introduce their friend to him. One day, a new neighbour moved in next door. He couldn’t help but notice that he seemed kind of reserved and cold. After getting a glimpse of him, he was ready to make trouble. He used his numerous ninja skills to discover his new neighbour’s identity. It turned out he was the English teacher at his niece’s school! Not only did he like his work and was his fan, but he was also his editor’s friend!

- Description from Novelupdates

Being given a chance and reincarnated is nice and all, yet why do I have to become that male friend who just watches the protagonist flirting with his harem?---World: Kaguya-sama: Love Is War - Hyouka ----

Ethan possessed everything one could desire, wealth, happiness, luxury cars, and a loving girlfriend.He had never fought a day in his life, but then suddenly, he woke up in a different world.A world were destruction and bloodshed was the norm. A world where the weak had no place to survive.Ethan now possessing the body of a boy who had failed his awakening twice and was on his last try, now stood in this world.Can Ethan who never fought a day in his life survive in a world where battles and death occurs every second, minute, hour and day.Would he rise through the ashes of the world, or would he burn with it.