This is a romantic comedy starring an adult 30 year old woman named Ayako who is confessed to by a man 10 years her junior, 20 year old college student Takumi... A man she knows as the boy "Takkun" who lives next door and who has tutored her adopted daughter since he was 10. The revelation astounds her as she thought her daughter Miu and he were an item.

From MangaHelpers :
High school student Misumi Makoto is called into a fantasy world by the god Tsukuyomi, in order to be a hero. However, powerful others in this world aren't as thrilled to have him there, and they kick him to the edge of the world just as Tsukuyomi declares that he must leave Makoto to find his own way. Now it's up to Makoto to find his own way.

A story about a little summoner girl that accidentally summons a shark from another world as her pet that has all of the powers seen in shark movies in the modern world.

Sana, the daughter of an item shop in a corner of the castle town, went out to the forest to pick medicinal herbs as usual in order to make recovery potions for the store's products. There, Sana picks up her mysterious book.
Because she read the strategy book, the daughter of the item shop, who shouldn't have anything to do with the story, is greatly involved in the story of the game!
Another world romantic comedy adventure fantasy!

A quirky school life story about a girl who loves playing guitar and a group of friend who shares weird imaginations and conversations to entertain themselves from the boredom of school.

Reaching his limit due to daily work, the corporate slave Enami Shuusuke collapses on the station platform one day. In that moment, memories of his childhood friend, Yorumiya Hina, who died in an accident, flash before his eyes.

"I'm sorry, I couldn’t save you then."

As Shuusuke falls into a deep sleep bearing regret, he finds himself time-leaping back 10 years! Thus begins the time-leap rom-com of a corporate slave reliving his youth in order to save the childhood friend he couldn't save 10 years ago!

The student council president, Takamine-san, is at the topmost of the school hierarchy, a god!
One day, Shirota-kun accidentally saw Takamine-san’s naked breasts.
From then, his school life changed. ― “Put my panties on for me”
Shirota-kun has ended up in predicament of Takamin-san’s pink colored favors.

Hirano, a second-year in high school, lives in a dormitory on his campus and has recently become roommates with Kagiura, a first year. Kagiura is a hard-working student on the basketball team, though he does have difficulty getting up in the morning, leaving Hirano to be his support system in that regard. They get along great, and Hirano is very fond of his earnest, straight-forward roommate. What he doesn’t know? Kagiura is pretty much head over heels in love with him.

Note: Set about six months after the events in the novel.

Noa Zuiho, a second-year high schooler with amazing tactical analysis skill, is brought to another world!

In order to save this other world from monsters, the goddess gives him the Power of Wisdom, which increases his tactical insight through... erotic actions?!

In an epic war between humanity and monsters, who will prevail? A brilliant strategist rises — with unorthodox methods and adult incentives to motivate his all-female army!

One day, a picture book writer named Yorozu Hiraku was asked by his close online friend, Chintarou, if they could share a room together while he attended a nearby university. Although they only knew each other through online interactions, Hikaru agrees to it without much thought. However unbeknownst to Hikaru, Chintarou, despite having a male name, is actually a girl; a very well endowed girl.

After falling into the ocean, Wataru Toyoumi, finds himself reincarnated in another world! Armed with a skill to allow him to summon boats he plans to get rich and live a happy life aboard his very own luxury liner.

Aono Hajime was a prodigy violinist until he grew jaded with playing the violin due to personal reasons. Now in his third year of middle school, he struggles to decide his academic path. One day in school, he meets Akine Ritsuko, a hotheaded novice violinist who wants to enroll in a high school with a distinguished orchestra club. When he finds himself getting closer to Ritsuko and being brought back to the world of violinists, time starts moving again for him.

This is the beginning of a youthful drama where sounds and hearts alike resound in harmony.

Note: Winner of the 68th Shogakukan Manga Awards for best shounen manga (alongside Yofukashi no Uta).

These are the recollections of a group of men who bet everything on their bicycles. The central pillars of their respective teams, the 3rd years. New stories revealing their pasts is about to begin!!

This story begins when the protagonist, a boy named Sora Akizuki, confesses his love to Miya Fuwa, a girl he has been in love with for a long time, and is rejected. When Sora learns that Miya likes someone else, he visits the dubious “Trialing Club," of which he is president, and tries to find out if he is the right person for her. The first episode shows the reality of the Trialing Club, whose activities one cannot imagine from its name, and the reason why its president, Suzukaze, created the club.

Guy's whole class gets summoned to another word, except he's the only who one was transferred to a different one. Just when he gets used to his new life, he gets summoned to another world again, and again.

A plain, quiet guy named Fujimori admires a girl who's too beautiful — Kurumi. Because of his shy personality, he freezes up and can't speak when he gets attention, so he's never once talked to her and they shouldn't have any connection… or so he thought? A wild, emotionally intense beauty and a gloomy, oblivious boy — their clumsy, mismatched love comedy begins!

Regnard defies expectations by enrolling in the esteemed Royal Academy of Lasarzia despite being a dropout.

However, during the Blessing Ceremony, he receives a peculiar skill called "Blessing of Sleeping Together," leading to ridicule from classmates.

Despite the mockery, Regnard discovers the true potential of this skill when he spends the night with Frost, an honor student.

This revelation leads to unexpected adventures and a harem fantasy, as Regnard navigates the challenges of his newfound abilities and hidden desires.

I, Teruaki Nakamura, transferred to a school Okinawa and developed a crush on a girl named Kiyan-san, but I don't understand her dialect. Higa-san is always helping me by translating the dialect. A slightly different cultural love starts on the southern island.

Links:
Artist’s Pixiv: https://www.pixiv.net/en/users/1821198
Artist's Twitter: https://twitter.com/egumisky
Artist's 2nd Twitter: https://twitter.com/nu_sisa

A polite and lethargic boy was reincarnated in another world as a vampire bishoujo. In this world of swords and magic, this protagonist who was reborn replete with all kinds of cheat powers was searching for one thing――! “Three meals a day, snacks and an afternoon nap, I guess.” Are you really the protagonist! And thus begins the fantasy comedy of a vampire looking for the ideal moocher lifestyle…?

Kagari, an ephemeral beauty, reunites with her older childhood friend, Nana-kun, and begins her romantic assault on him.