Short Version:
An overpowered man helps anime and comic characters in exchange for sex.

Long version:
An ordinary man dies an unremarkable death and wakes up in a world with one glaring problem — there are no women. Determined to escape, he does the only reasonable thing: he grinds his way to godhood.
It works. Mostly.
Instead of the freedom he earned, he finds himself bound to a shop drifting through the multiverse, cosmically assigned to help women from across different worlds with their deepest wishes. The payment the universe has decided upon is, to put it delicately, not gold.
He didn't design the system. He just has to live with it.
What follows is less the power fantasy he imagined and more a series of encounters with remarkable women — warriors, survivors, and outliers — each carrying their own weight, their own scars, and their own reasons for walking through his door. He fulfills his end of every contract to the letter, no more, no less. 
As he ventures forth, he becomes deeply involved in their challenges, providing comfort, advice, and protection.
And, amid his selfless acts, he secretly hopes that someday, somehow, his unwavering dedication and kindness will be reciprocated. 
Will his cherished dream of a Harem come to fruition, or will the universe have different plans for him?
Embark on this captivating journey, where desires, determination, and duty intertwine, showcasing a man's quest for personal fulfillment and the salvation of others.

.....
Worlds:
Oshi no ko
Chainsaw man 
Marvel
DC
One piece 
Naruto
Attack on titan
Bleach
Jujutsu Kaisen 
One punch man
And more....

......
Not a Translation.
No use of AI in any shape or form.
Read 30-40 chapters ahead on Pat.reon
https://www.patr.eon.com/Over_The_Moon69

Character Reference