The Author is an Extra, The MC is a Reincarnator - Chapter 44 First Job [1]

The waves ripple around me,calling me in a whisper,Into the deepest part of the ocean.As I walk on the soft sand,the water sweeps over my feet,surrounding where I stand,giving me the sweetest sensation.Oh ocean,why do I feel so attracted to you?Why do I feel the tickling of your whispers?As it causes cold shivers down my spine.I could hear your gentle lullaby,It roars like a lion, yet so steady and honestJust like a refined diamond.Oh, sea, why do you call my name in a whisper?Caressing waves upon the shore,Once again you beckon me.Why do you show yourself at my doorstep?Why do I feel your presence everywhere I go?Why do you call me so desperately?I want to know, cause when the sea calls?Who will answer?

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

Three years ago, in the land of Reinbulk, a Legendary Hero was summoned in the Kindom of Leezalion and he succeeded in repelling the Demon King. Now, five students are summoned back into Reinbulk by the Kingdom of Luxeria to fight against the Demon King and the demon army. Unlike the other heroes, Yashiro Yuu has no magical affinity and the Luxeria Kingdom has no intention on acknowledging his existence or returning him to his world.

In a world where martial artists reign supreme, strength is everything. Unfortunately, that logic doesn't apply to a certain Florida Man.

Refined in the nuclear fallout wasteland, Leo was the strongest mutant alive. He carried an alien artifact, allowing him to exchange his lifespan for modern items. After 50,000 years of solitary life in a humanless world, he collected enough lifespan to transmigrate to another habitable world.

Leo was later thrown into a mysterious planet. He soon discovered that his body produced radiation, and it mutated the surrounding plants and grasses. Worrying that he might ruin the beautiful planet, he chose to live in seclusion.

Unfortunately, the local population soon discovered his existence, and a misunderstanding ensued.