The protagonist along with his step-mother, and 2 step-sisters are summoned into another world where demi-humans are the rulers as saviors, but its not to fight against a demon lord, its to fight an Undead Apocalypse monsters called "Dead Mell" that have overrun the world and that can only be killed by using weapons made with holy silver.

For that, a familia is made (group of 4 people) with them being the swordmaster that uses the holy sword, the guardian that uses the power of earth to protect, the healer that use the power of water to heal and the black mage that uses the power of fire to destroy.
The role of the guardian, the mage and the healer is to support the swordmaster that can only kill the monsters.

But to use magic powers one must offer part of your being as a sacrifice to form a contract with spirits, and the higher the sacrifice, the higher the power. Now they must choose who are the 3 that need to sacrifice part of their bodies to gain power and who will wield the holy sword.

A middle-aged detective, Eiji Kirisame (40), meets a strange high school girl at the scene of a certain crime. She doesn't speak a word, but she helps solve the case using her drawings. However, suddenly this middle-aged detective is getting a marriage proposal from this girl!

From MangaHelpers:

Utilizing a system called "Sense," each player aims to create their unique character in the VRMMORPG "Only Sense Online." Joining this realm is Yun, an absolute beginner in the world of gaming, equipped with some of the worst customized "Sense" ever. While his two sisters, both veterans in this world, criticize his choices of equipment, he continues to delve into the skill sets he has acquired. Along his way, he meets the art of "production" and people that have mastered this art. Watch as a total novice creates a revolution in the gaming world and create the "ultimate" support class. [DrCoke]

A manga adaptation of the novel (https://note.com/saranami/) written by Maruto Fumiaki. The artist for this adaptation is Yom, the mangaka of *Ganbare, Douki-chan*.

One day, a dull young man from Japan gets caught up in a heroic summoning and goes to another world. The next time he wakes up, he's not in a castle with a king, but in a deep forest since the summoning failed! You'd think he'd be at a loss, but he starts living a life of survival with a positive attitude that doesn't involve deep thought!
Then, before he knows it, he saves the cursed forest and magical beasts one after another with his magical powers, and is befriended by wolves and dogs in a healing paradise! However, he doesn't realize that they are actually legendary demonic beasts and spirits at all. What's more, that they are adored! A positive young man unknowingly plays with the legendary magical beasts, a heartwarming and misunderstood fantasy begins!

One day, when I was making school supplies in the art room, a very scary-looking girl was staring at me...!? Crafts girl vs. art boy romantic comedy!!

“You just die one day and turn into a mummy!” Mysterious mummified corpses that people have nicknamed “Mummily-sans” keep being found one after another, causing a lot of fuss. One day, a boy named Seita notices that his friend is acting strangely…?! Don’t miss this thrilling suspense story about an invasion by the unknown!

It has been seven years since Sora Ono was sent to another world, where she was enslaved. Because of a clerical error, her “slave” status was revoked, and Sora walked away a free woman. Then one day, she purchases a slave...

In the era of space exploration. Mankind is at war against monsters of unknown origin. The battle is grim, and the future looks bleak. Amidst the chaos, mankind plays their last hand; it's time for the Knights to step into the fray and turn the tide of this war.

There's an orphanage which trains its charges to be weapons of war, assassins specialized in magic. At this "school" Shiina has been having a difficult time coping with her roommate's death. She completely ignores rumours, including that of a supposedly impervious student by the name of "Mimi," who is thought to be even stronger than the teachers and isn't part of any group. While taking a breather, she encounters an overly cheerful young girl covered in blood, a they chat for a while before the child is hauled away by the school nurse. Shiina thought that they wouldn't meet again, but the next day, the girl transfers into her class and cheerfully introduces herself as Mimi.

"Won't I be able to get filthy rich if I use this skill?"

Continually exploited at work, Amata Shirou quits his job and moves to his grandma's house. When he finds out that it's connected to another world, he comes up with a plan to set up a business selling Japanese goods.

The story of a man getting rich using his skill that converts the currency of the other world to Japanese yen and so forth.

Web Novel RAW: https://ncode.syosetu.com/n4097fo/

The end of the world is coming, and human beings have awakened their superpowers and fought against the monsters in the towers. However, there is a strongest BOSS sitting at the highest point of the tower – Demon King Jiu Ming. He is an insurmountable barrier for humans. One after another, the brave men always thought that they were the protagonists in the story, but the halo of the protagonists never came to them. When the protagonists lose their protagonist aura, they no longer are the protagonists.

Park Han-jun, once called a legend, was frustrated because he had nothing to lose anymore is given a huge amount of money.

An eye for an eye. An eye for a tooth! I’ll make you pay for what I’ve gone through!

As his rage explodes, he’ll get his sweet revenge and make them pay as much as they deserve!

A slightly erotic home love comedy that unfolds under the roof of the Yoshita family!

The eldest daughter, Juri, wears a swimsuit at home. The second daughter, Minori, has big natural breasts. The third daughter, Anri, loves reptiles. An adolescent boy who is an idol otaku becomes a sibling with these three girls. Under the roof of the Yoshita family, another naughty incident occurs today! [Translated by DeepL]

The Nagare family had a happy home with three parents and three children. However, their son Kiritaka was secretly bullied at school. Then, an incident occurs, and the mother Mari's love for her son goes out of control.

Jo Ja-Hyun (Jay) is the student president of Taeyang (Sunny) High. He is not just a smart student but an extreme biker with high techniques. As you follow his bike, you will meet his friends, love, and adventures.

A girl who calls herself the Demon Lord falls upon the main character, an elementary school teacher living in the countryside, and they decide to get married?!

She transmigrated as the opposing boss in the novel, but she was wiped out by the male lead. Fortunately, she reincarnates once more, but back to the past, when the male lead was still young! Looking at the pitifully weak male lead, she was troubled by a dilemma. Should she: 1. kill him, or 2. raise him up and openly ask for treasures from him. However, since she wants to get all sorts of treasures from the male lead, she chose the second option. Things don't always work out though, as she accidentally raises a sheep up to be a big bad wolf.

Master? Want treasure? Let's cultivate together, but alone, just us two, then.

Due to an accident, the protagonist Varius died and was reincarnated. He was shocked to find in this new world, his former job as a Tamer in the previous world was acknowledged as a low class job in this new world.

Utilizing his knowledge from his previous life as a basis, he then applied unique buffs to his beasts, taking back the ultimate power that he once possessed.

With this power in his hands, he sought to start his life as an adventurer. However-

Artist's Twitter (NSFW): https://twitter.com/NiwaRhythm
Webnovel: https://ncode.syosetu.com/n7251fq/

Lee Hyunwook, the steel emperor, was the last savior of mankind, but died. In order to change the future, the place he regressed to was… The military?!! "Why here of all places?!" The start of Corporal Lee Hyunwook, who gets stronger in a special way, by doing a steel mukbang!