Toaru Majutsu no Index - Volume 15, Chapter 4: The Paper-Thin Difference between Self Derision and Pride. Enemy_Level5.

Short Version:An overpowered man helps anime and comic characters in exchange for sex.Long version:In an unexpected turn of events, an average man meets his demise and finds himself transported to a mysterious new world. Driven by his deepest desires, he yearns to create a group of women who adore him—a Harem. However, he soon discovers a surprising truth: there are no women in this world.Determined to escape this peculiar realm and protect his virtue, our hero sets out on a challenging journey of self-improvement. Through hard work and unwavering commitment, he attains godlike powers. But even with his newfound abilities, he finds himself confined to a shop within the vast multiverse.Within the walls of this enigmatic shop, our protagonist faces his true test. As a divine duty, he must assist distressed women from different parts of the multiverse, offering them his strength and guidance. However, the cosmic balance demands a price, and the reward he gets is.... SexThroughout his adventure, our hero encounters women from various backgrounds, each with their own unique struggles and stories. As he ventures forth, he becomes deeply involved in their challenges, providing comfort, advice, and protection.Yet, amid his selfless acts, the man 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 desire, determination, and duty intertwine, showcasing a man's quest for personal fulfillment and the salvation of others......Worlds:Oshi no koChainsaw manMarvelDCOne pieceNarutoAttack on titanBleachJujutsu KaisenOne punch manAnd more....

Rotten! Rotten! Rotten!
Yin Li was fired by the company and dumped by her boyfriend. When she woke up, she found that she had traveled to the orc world. He thought that with the brains of modern urbanites, he could make a fortune, but he found that courtship alone was enough to stumped him.
The blond lion orc likes bamboo horses, and the black-haired and yellow-skinned black bear orc has long been engaged… Looking left and right, only the hyena orc who looks exactly like his ex-boyfriend sends a “signal” of love to him.
However, it is rare to come to another world, but also to eat grass? Yin Li said: “Ugly refused!”

- Description from novelbuddy

Payload specialist, Tang Yue, who is a mechanical and electrical engineer by training, is left stranded on Mars when he receives news from his AI robot assistant, Old Cat, that Earth has exploded. He believes himself to be the last human in the Universe.

Due to an accident, Chu Ling, an Omega, was forcibly marked by a strange Alpha named Han Gu. The government stipulates that the marked Alpha and Omega must be married. The two were forced to live together on the premise of marriage, and Chu Ling had to break up with his ex-boyfriend.

After cohabitation, both parties are affected by the mark, are particularly sensitive to each other’s pheromones, and are also extremely thirsty for each other’s bodies. From the beginning of the two people’s rejection and resistance to instinct, to understanding each other, and finally falling in love with each other. Willing to let the other person into his heart.

“If I give you another chance, will you choose him or me?”

“I choose you.”

- Description from Novelupdates