Crying Brothers: The Little Sister We Hate Is Actually a Bigshot - Chapter 341 - : Wedding Ring

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

"Five years! Do you know how these five years have been for me?"

It had been five years since Gongzi Liang was transmigrated to a fantasy world and had received the Legendary Gold System.

However, the system kept nagging him to top up every time.

[$3 for God's Ring, $6 for first-time reward, $18 for enhancement, $28 for God-tier Beast...]

Gongzi Liang could only look at all the god-tier rewards and couldn't do anything because he didn't have money.

But, he did realize that he could level up his skills and strengthen his body by using copper coins. It could save him 99.99% of training.

It wasn't even hard for him to jump a few ranks in one day.

He would also gain coupons by completing the daily missions.

Just like that, Gongzi Liang became obsessed with completing his daily missions...

“What kind of guardian would you want to be? the one who destroys everything or the one who protects everything?”

Jason, one of the many casualties during a nuclear explosion gets the chance to reincarnate into another world due to his deeds during the war.

He gets tossed to another world due to ending up with the Shadow god as his patron, something deemed impossible.

With a system to guide him in the world of Clover and a family jinxed through the generations, his adventurous life in new world begin.