15 years ago, Kusanagi-sensei gave up her love (♀). Now, her lost love's daughter is her student?! As she wavers under the pressure of her student's relentless attacks, Kusanagi-sensei's (♀/36) era of trial begins!

Raw: http://sai-zen-sen.jp/comics/twi4/kusanagi/

To stop the otherworldly "Kaijuu" from invading Earth, individuals wielding special powers known as "Aegis" are tasked with the protection of the world. Aratsugu Yorino is one of the aspiring "Bastioners" - soldiers who fight the invaders within the wall between the two worlds.

Yorino and her best friend Haruka were always at the top of their class, and vowed to become professional Bastioners together. However, when a Kaijuu broke through the wall during one of their exercises, Haruka lost her life saving Yorino. Cornered by the Kaijuu once again, Yorino was rescued by a Bastioner called Kaminoi Youko. After asking Yorino to give her Aegis energy, Youko defeated the Kaijuu with overwhelming power.

With her heart full of determination, Yorino placed first on the Bastioner exam, all for the sake of saving herself from ever feeling loss again.

The future. The people that migrated to an alternate dimensional space, seeking a new world to live in, started an armed rebellion in order to declare independence from Earth. Thus, multi-dimensional war broke out with the United Army of Earth. The battlefronts spread, and the fight grew long.
In their desire to break the deadlock, the United Army of Earth decided to launch a large-scale offensive, deploying to the front line vast amounts of "Assault Girls" -- new arms that would render all previous weaponry ineffective.
Piloted by outcasts and criminals, the members of the The 13th Independent Assault Girl Hunting Platoon -- dubbed "The Hyena Platoon" -- are tasked with hunting down and destroying rogue Assault Girl pilots, who have succumbed to the corruption that eventually befalls all pilots.

Kugami Sugara just wants to lead a peaceful school life.
But being chosen by the beautiful and talented Shirasagi Yui to be her pseudo 'sister', her life is anything but peaceful.
And to make things even more interesting, Yui's cold but capable identical twin sister (and also student council president), Shirasagi Ui, also takes an interest in Sugara.

From there, things go as well as you might expect in this yuri comedy!

Author's Twitter: https://twitter.com/ndoromaru

From Girls in Boxes:

Mari's girlfriend, Arisa, loses her memories of the past three years, including all memory of their life together. However, it turns out that being crazy in love with someone transcends all realms of possibility.

From Yuri Project:

Yuu and Haruka were inseparable during junior high but a cruel twist of fate put them on opposite sides of the class when entering senior high. Forced to spend more time with their other classmates, they decide to do something to keep their relationship special.

Yae and Chitose have been dating for one year. Their relationship continues in this sweet and fluffy slice-of-life story.

Momoka who has become an arasa with zero romance experience. Frustrated by this situation, she discovers the existence of "lesbian sex" while searching for an online encounter. Momoka decides to use it, but she is attracted to her by having sex with a lesbian sex girl "Riko" who appeared at the meeting place, but she has a secret ...?

What happens when a classmate finds out about another girl's secret yuri obsession/feelings? A yuri comedy ensues!

The manga focuses on twin sisters.

Sadistic middle school girl x unpopular teacher

Ajafuji Sara transferred to the private Fujigamine Academy. She suffers from extreme blushing and dreamed of making friends at the academy and having an "ordinary student life". However, having met at the scene, Kazari Iris set her eyes on her. Will her dream crumble away?

Despite her clumsiness, teenage school girl Chihiro is popular at her school, especially with the boys. She joined the wrestling club a few months back and has been practicing without much apparent success. However, she wins her first competition surprising everyone including herself and her fan boys become more passionate about her. Will Chihiro be able to become an amazing wrestler?

Yilin bumps into the tomboy Rouxi, sparking an interest between each other that slowly blooms.

After being hospitalized, Sana, meets a mysterious girl at the vending machine named Kousaka Ayane. They are both interested in each other and start spending time in their rooms. With every meeting Sana experiences new emotions which she hasn't felt before. After Ayane's doctor tells her that she is going to leave hospital she meets Sana one more time...

A few generations ago, a mysterious phenomenon occurred. Humans now die after 1.5 billion heart beats; half the heart rate they originally had. Schools began teaching students how to control their emotions and regularly preformed heart rate tests.
No one is allowed to use more than the number assigned per week.

This is the story of 2 girls that chose to love in this world regardless of their heartbeats.

Hajime, a girl who can’t seem to properly express her feelings into words, is worrying all on her own about the preparations for the cultural festival. This will be the last festival for her film club. There’s always been things she’s wanted to do for the festival, but like last year, she’s given up and the festival will probably end without her doing what she wants to do.
That’s when she meets Kei Ichinose, another student at her schoolー

Comic-Walker Synopsis translated by DeepL:

Two 14-year-old girls; Toko, an athletic girl, and Yui, a smart girl, are transported to a strange world where girls' sex toys have magical powers. This is a slightly naughty adventure story where they attack monster girls and collect them!

An all-female family manages a small inn on a small island. Mother, aunt and 4 daughters are all very intimate with each other and wish to help their (female) guests to unleash their own yuri feelings.

Unable to enroll in magic school due to her potentially dangerous magic, Ema Stone is sent to the headmaster's mansion to study under her five students; Rebecca, Flora, Bella, Jill and Daria.