MTL - Summoner of Miracles - ~ Chapter 1 "Youth" and "Girl"

Three thousand years of bowing down to the Demon Lord, I would rather be a mortal than a celestial being when looking back, but for her I will… become one who controls life and death!

While I was reading the first volume of “Danmachi,” I suddenly felt my cock grow. It grew so much that it started to hurt.Suddenly, my sperm gushed out. Before I could understand what was happening, I realized I was in a familiar place.

Kuramoto Daisuke, a freshman in High School was suddenly exposed to someone vanishing in front of him. Turns out he was admitted to a Special Class full of Isekai Heroes that were regularly summoned to Otherworlds since the start of their Middle School. He was told that he was to become their Support to prevent each of the Heroes' fate of dying in the world they were summoned into. Though mediocre, he realized that his ability has a great potential but it needs a lot of hard work on his part.

Unconvinced of being just the Support Character, he vowed to excavate his mediocre ability, all the while supporting the Heroes using it.

And maybe more.

Once I’ve become Immortal, then my attempt to conquer the world shall begin.

I, Zhong Shan, in order establish a supreme heavenly dynasty, must marshal all the luck that I can gather to cleanse my own karma. Then I will have the strength to fight heaven itself, create a new world, and live forever.

First: Fate

Second: Luck

Third: Feng Shui

Four: Cultivate Inner Virtue.

Five: Fame

To gain eternal life.

To obtain fame, one must establish a heavenly dynasty and amass the luck of the world!

To cultivate inner virtue, one must establish holy sites and accumulate an immeasurable amount of merit!

To cultivate Feng Shui one must learn to communicate between yin and yang and control the powers of heaven and earth!

To cultivate luck! To cultivate fate!

Ask the whole world, who can have eternal life!

- Description from Novelupdates