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.

Having become overwhelming strong, a mage was bored with his life and decided to reincarnate in another era about 1000 years later.

But after reincarnation, the mage now known as Kurt saw a world where magic had declined, and the mages of the era are overall much weaker than those of 1000 years ago.

It also seems that Kurt is being looked down upon for his "Gold Magic" as it is called "Defective Magic Power" in this era.

In order to investigate the mysterious decline of magic in this era, Kurt enrolled in the Magic Academy at the Royal Capital and showed his extraordinary talent where he would become unparalleled in this second life of his too!?

(Translated with permission) Listen, she's just a normal human female, okay? So obviously she can get normal human married, just like any other human.
Definitely normal human and not a shapeshifting cat of any sorts, can't stress that enough.

Author’s Twitter: https://twitter.com/stylish_tanaka0

Makoto and Shinobu are my two childhood friends whom I haven't seen in years, but who had always been admired as being the manliest of men, even when they were kids. I, Ryunosuke, am going to be attending a high class school that was once an all girls school, but has slowly started to admit boys. Makoto and Shinobu were already attending there, so the three of us will now be sharing a room together in the school dormitory. I'm looking forward to the start of my rough but manly school life. However, when I get there, it turns out that they are both girls! GIRLS!! I now have to share a room with two people who I, for my entire life, had always thought were boys! They then tell me that it's a secret that they are really girls and that they've been pretending to be boys. Now I will have to help them keep up this rouse. What am I going to do??!!

Thus begins the story of Ryunosuke's manly school days which will now be filled with days of plumpness, sexiness, and the maximum amount of naughty slip-ups!!

From cotton candy scans:

Yukito is a handsome scholarship student who also excels at sports. Just starting high school, he has never had the time to think about things like love.

One day, he was saved by a girl he didn't know. Turns out, she's actually Yukito’s classmate who’s been absent since the school’s opening ceremony...

Shino Chigasaki is a high school girl who dreams of experiencing a romance likes those in shoujo manga. On the day of her high school entrance ceremony, she drops her commuter pass and the guy who picks it up bears a striking resemblance to the handsome boy in her dream...! Shino has been shot through the chest with Ichinose-kun's little gesture!? The comic version of "Kaishin no Ichigeki," a song written by Amatsuki, a popular singer.

Manga adaptation of the music video of the same name by Amatsuki.

Links:
Amatsuki ver.: https://youtu.be/Q7AVA1e0qN4
Hatsune Miku ver.: https://www.nicovideo.jp/watch/sm33546188

A manga about modern Japan where anomalies known as ‘hizumi’ or 'twists' appear and mix together objects. After a high school delinquent, middle school nerd, cat, and flea end up fusing together, they embark on a quest to learn more about the anomaly.

In an attempt to win her homeroom teacher's heart, Itsumi Toudou purchashed a shady love potion, and tested it out on her stuck-up student committee president, Yomotsuka. Now, she has an uncharacteristically affectionate girl to deal with, and she's not even a lesbian! Right?

The comic adaption of the super popular novel from syosetu ni narou.

Hizutome Rakurou loves shitty games. His next challenge is Shangri-la Frontier, the god-tier game with a total playerbase of 30,000,000. Gathering comrades (scum) in an expansive world and meeting with old enemies along the way, he will change the fate of every player.

An office drone finds relief from his job by attending the ballpark close to his daily commute. He asks a vendor girl for a beer, but for some reason, after the transaction she sticks around him...

They haven't done anything yet - A story about a serious, simple, unadorned young man who wears nothing but the purest of clothes, never dreaming that he would fall in love . Until he meets a fragile girl working at a bento shop one day. This is a story about how a man and a woman who have never been in a romantic relationship before , start their newlywed life.

The Dark Knight Jade is tasked with guarding Princess Vignetta, whose mother was the slain Demon Lord, as this was her last wish before perishing at the hands of the Hero. The Princess is but a sweet small child brimming with virtues, so Jade wonders:

When it comes to the time, will the Princess side with evil like her mother did and fight the Hero? A girl this sweet, no less?

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)

12 girls are imprisoned in a mysterious prison.

Fighting their way through this unjust and abnormal conditiions, these girls have begun a life and death struggle.

A harrowing little girl prison escape survival!!

In the distant future, advances in AI technology led to wars being fought without human soldiers. However, at the end of the 22nd century, a mysterious aircraft called "Gayla" shut down all AI, and humanity now must relearn how to wage war. Sakamoto Teppei joins the military in hopes of becoming a soldier, where he is sent into a simulation of the Battle of Waterloo to learn how to kill people.

Mylene loves fun things. Whether it be fine arts, sculptures, drawings, or music, she loves them all. However, all those things had gradually disappeared due to the long-standing war. Thus, she decides to cast a time freezing magic on herself to awaken at a period after the war. Waking up 2000 years later, there was only a wasteland around her. Thus began her leisurely life with her golem maid. However, meeting with the villagers, that takes a turn. Will her wish to live a leisurely life be granted?

An ordinary office worker should have died in a traffic accident, but when he awoke he became a goblin. Goblins have a lifespan of only seven days. However, the hero who has been given the skill "Human 80 years" takes advantage of his longevity and takes over the skills of many goblins and even the demon king who is on the verge of destined life, and stands out in a different world. Weakest Race x Strongest Skill = The strongest fantasy is incomparable!

When I opened my eyes, I was inside a novel.
[The Birth of a Hero].

[The Birth of a Hero] was a novel focused on the adventures of the main character, Choi Han - a high school boy from Earth who was transported to a different dimension - alongside other numerous, rising heroes of the continent.
I became a part of that novel as the trash of the Count’s family, the family that oversaw the territory where the first village that Choi Han visits is located.

Choi Han became vengeful after that village was destroyed by a mysterious group of assailants, and grew incensed after he reported the matter to the Count's son and got brushed off. He gets beaten to a pulp.

“…This is going to be a problem.”

But, I feel like it is worth trying to make this my new life regardless.

In December, Miyuki receives an invitation for the Yotsuba's new year's family gathering. However, unlike previous years, they specially added "Everyone must attend" on the invitation. Miyuki understands that "the time has come" — it is time to decide the next head for the Yotsuba Clan.
— If she is elected, her brother will be free.
— If she becomes the next head, she will be forced to marry someone else.
Miyuki's heart is a mess.
The truth of the Brother and Sister relationship is finally unveiled!? Yotsuba Keishou-hen begins!

Adaptation of the original novel's volume 16.