It's stuck deep inside me and I can't get it out of my head. Mafuyu's voice is an insane and dangerous weapon.

That day, I started to feel that playing the guitar and playing basketball, both of which I liked very much previously, was becoming boring.

Uenoyama meets Mafuyu who's holding onto a broken guitar. The moment Uenoyama finishes fixing the guitar, Mafuyu becomes completely attached to him. However, hearing Mafuyu's song by chance leaves a deep impression on Uenoyama. An alternative love drawn by Kizu Natsuki!

A supreme utopia (romcom) created using data!

'I want to have a romcom-like experience.'
Haven’t all romcom lovers who enjoy light novels thought this before? Being all lovey-dovey with the heroine, and leading a fulfilling high school life with the best of friends. However, there’s no way something that exciting could happen in reality. I have no younger step-sister, no childhood friend, no classmate who’s an idol, no mysterious senpai, and not even a male best friend character. That being the case, what can I do? Obviously, I have to put it together myself! For a romantic comedy, you need both data analysis and constant practice! As well as…

Alvis, the hero, lost his life in a battle with the Demon King. However, he lived on... as a skeleton!?

Ending his career as the hero who defeated the Demon King, he spent 3 years sleeping, playing and enjoying every day. However, in order to find his long time friend, Izana, he once again enrolls as an adventurer, and changes his name from Alvis to Al the Skeleton. Due to his appearance being that of a skeleton, trouble is not out of the question for his near future!

Protecting travelling merchants, mapping unexplored dungeons and so on; whilst undertaking numerous requests, Al the Skeleton wields his sword another day in order to save lives.

From Batoto:
Kikuno Kei, nicknamed "Kay", is a normal university student and a part-time hitwoman.

The story of a mute girl and the girl who befriends her.

Sengoku was a period when Japan was in war, a period when humans were still able to communicate with Gods. Young Sarutahiko has died because of the struggle, but he will be resurrected and turn into an immortal thanks to a God's power in exchange of consuming his sister's life day by day. To save her, Sarutahiko will ask for help to the God of the Mountain, but instead, he meets a beautiful young girl... What is the true identity of this girl?! What kind of God is capable of granting wishes in exchange of souls, blood and death...?!

The future-fantasy world of Remnant is filled with ravenous monsters, treacherous terrain, and more villains than you can shake a sniper-scythe at. Fortunately, Beacon Academy is training Huntsman and Huntresses to battle the evils of the world, and Ruby, Weiss, Blake, and Yang are ready for their first day of class.

Note: This manga is based on the independent American 3D-CGI animated series by Rooster Teeth (created by Monty Oum). The manga itself is a prequel to the original animated series, and delves into the circumstances surrounding the four main characters.

Sawari likes to harass her childhood friend, Kiyoto. Sexually.

A spin-off of the various works of Kamachi Kazuma. One day, Kamijou Touma (A Certain Magical Index) faced yet another misfortune. His toilet was broken and spraying water everywhere. As he was lamenting his misfortune, suddenly he appeared in a strange place along with Index and Misaka. Soon enough, more strange people begin appearing...

Includes:

A Certain Magical Index
Heavy Object
The Zashiki Warashi of Intellectual Village
The Circumstances Leading to Waltraute's Marriage
A Simple Survey / A Simple Monitoring
Killer Princess and Deep End

Her secrets that only I know...

Izuki Hayashi, a timid otaku who has just entered high school and wants to become a manga artist, is sitting next to a very scary-looking Yankee JK! The way she talks, the way she looks, the way she acts, everything about her is terrifying... But it turns out, she has a lot of unexpected weaknesses?!

The little fox goes downhill to avoid the calamity. She encounters the rich and handsome Professor Tian You. Getting along with each other day by day, the naughty and cute little fox gradually falls in love with Tian You. But the coming of the calamity makes the fox show herself in her true colours. And the identity of Tian You is also a mystery. At the same time, the brother of the fox who is a superstar also finds her and wants to take her away...

When a child is born, they are granted a [JOB] by the goddess of light. Unfortunately, Ain is granted the unfavourable job of an [Appraiser]. All he can do is appraise materials, and so he is treated horribly by his own party. Then, one day, he happens to come across an S-Ranked tree hidden in a dungeon. Following this encounter, Ain slowly but surely changes...

Links:
Web Novel: https://ncode.syosetu.com/n5242fx/ (Japanese)

Shouko is a girl growing up in 90's Japan who just wants to stay in and play games on the Playstation. However, she is often visited by her grandma, who tries to make her do more productive things.
Lately, obaa-chan seems to be becoming more tolerant though...?

Tagline: "A Granddaughter x Grandmother x TV Game (and sometimes snacks) manga!!"

Long before any child of Earth came to the world of Tortus, the Liberators fought their own war: a struggle against the gods themselves. Oscar Orcus was never the type to seek out that kind of conflict. He lives a simple life as a magical craftsman. But when the powerful magician Miledi Reisen barges into his life, he’s swept up into the tides of history. When the two of them meet, sparks fly that will set the whole world ablaze!

Her secrets that only he knows...

Itsuki Hayashi, a timid otaku who has just entered high school and wants to become a manga artist, is sitting next to a very scary-looking Yankee JK! The way she talks, the way she looks, the way she acts, everything about her is terrifying... But as it turns out, she has a lot of unexpected weaknesses!

Sharks don't have lungs, but they do have to breathe oxygen to survive. Instead of breathing air, though, sharks get oxygen from the water that surrounds them. So they have to move around, if they stop moving for a while, they sink into the water and die, So Sharks have to move and move constantly from birth to death. The same goes for you. If you want to survive, keep moving, then you will be the best hunter… like a shark.

From Bulbapedia: (Japanese:まんが版 ポケットモンスター全書), is a shōnen Pokémon manga directly based on the Pokémon games. It follows the plot of Pokémon Red and Blue closer than any other Pokémon manga. Many details not included in other manga or the anime, such as the hunt for Safari Zone Warden's dentures, are covered. It ends with the defeat of the Elite Four.

Leader of hero squadron "Gerato 5 (Five)" aiming for world peace, Aikawa Fudou and fight leader of secret society "Gecko" aiming to conquer the world, Magahara Desumi ... there was a deep “fate” between the two of the organization ... !!

Mitsuru Masamune, a mild mannered high-schooler who hasn't had much of a presence since his birth one day had a roommate move in.
A silver-haired, blue eyed exchange student all the way from Germany, Leo.
They had a dignified appearance and had a cool way with their words with no room for timidity.
He used to think that Leo was a being far off from someone like him till he got to know about a secret of his after which their relation got a bit more special...?!

The mafia boss of the Iwashi family is a high school girl named Konomi Minoko. But don’t let her appearance fool you; she has done and seen things normal citizens can’t even imagine. Under her control are two assassins who have gained legendary status for their deadliness and ability to get any job done. Ishikawa Rushia, codenamed Baret, uses a modified handgun that uses a custom made hollow point bullet that explodes the target from the inside. Shirato Marin, codenamed Francesca, uses a original weapon that is a mix between a throwing axe and battle axe. Both of them are Minoko’s high school classmates and seem like normal teenagers but are two of the most feared killers in the mob world who handle missions often involving other assassins and underground groups.