The Demon Lord's Bride (BL) - Chapter 2: Transmigration shouldn’t be that bad

Roy’s life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
…
It’s really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

He was the continent’s strongest and most revered alchemist, Ye Zifeng. He was under one person and above millions. However, due to an unpredictable event, he had died. After his rebirth, he had become the supertrash of the Ye family and suffered disgrace. To make matters worse, he had an argument with his fiancé that led to the break off of his engagement. In this second life, he will work to change his own destiny. He vows to return to the peak of the world, trample on those who laughed at him and rewrite his legacy!

- Description from Novelupdates

Graduate student Yi-han finds himself reborn in another world as the youngest child of a mage family.

– I’m never attending school, ever again!

‘What do you wish to achieve in life?’

‘I wish to play around and live comforta-‘

‘You must be aware of your talent. Now go attend Einroguard!’

‘Patriarch!’

My future would be guaranteed once I graduate. For my future!

In Bleach, with mediocre talent, the protagonist has been flatlining for thirty years. But with the sudden completion of the Zanpakuto conception, he has become a “sword person.”Unlimited Blade Works, essentially “unrestricted swords.”Since Soul Society does not allow two identical Zanpakutos to exist, then I just won't use my Zanpakuto, and that should be fine, right?Who is the strongest in the Zanjutsu category: Zangetsu or Zangetsu: Black?Who is the number one in Assassination Techniques: Ichimonji or Suzumebachi?Which is stronger: Kinshara or Senbonzakura?Can the Yami no Tachi Shura and Yami no Tachi Rasetsu compete for the title of the strongest Zanpakuto?Unlimited Blade Works, essentially “swords,” all the “swords” in the world are mine. Yamamoto, even you, the head of the 1st Division, “Black,” cannot take away my “swords.”