This is comic about a high-school student's convenience store and OL (+ α). There is age difference & height difference.

I would die if it would allow me to touch you. That is my love. Airhead Yuri-chan and her boyfriend Aono-kun had a perfectly normal relationship until one day Aono-kun suddenly “passed away” … They will never be bound together, and they cannot even touch. This is their difficult and almost too sincere love story.

Kazuya Kagami never goes anywhere without the precious Sakura Obi his mother gave him. One day a beautiful, kimono-clad girl named Kiriha appeared before him. Kiriha naturally began to live with Kazuya in his room. Then there's Chisato, Kazuya's childhood friend with glasses and a ponytail, who meddles in his affairs. Soon there's also an overprotective older sister who seems to want to take baths with him. Jumble in a huge-chested priestess, a good-looking sorceress named Kokuyoura, beautiful women, and hot girls, and Kazuya's happy, embarrassing, confusing life 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!!

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 Because of a clerical error, her “slave” status was revoked, and Sora walked away a free woman.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...

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.

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]

From Intercross
Waka is a 13-year-old Go lover! Learning from her grandfather, a pro Go player, she comes to enjoy connecting with the people around her, regardless of age or gender. One day, she meets the young genius go player, Sagisaka Souji, in a match that tore at both body and soul, and so she decides to become a pro go player herself!

Pain perception 0, capture rate is 100!

A virtual reality game with pain perception set to '0'. I was the first to clear all endings, and started the final 100th playthrough... but something is off. Suddenly, I have a strange disease with a terminal setting, and the capture target characters are starting to worry about me.

"I don't feel any pain, so should I pretend to be sick?"

Before I knew it, to the capture target characters, I became a noble hero enduring pain and sacrificing for world peace. Since it has come to this, the concept for this playthrough is a terminally-ill hero throwing herself for the world! I must end it with a happy ending. This is my last playthrough in my life!

Izu Takashi was just playing the online game -Argate Online- like usual, but he suddenly noticed something strange, his level is now....!! Also he can not log out and the pain reduced funtion does not work.....

From MangaHelpers:
A young noblewoman once dreamed of becoming a magic user like in the old tales, but her time in magic school has dimmed her passion. One day, a mysterious man comes to her rescue in the forest, using magic like in the old stories. Despite the fact that he is clearly skilled in magic, he is thrilled by the idea of learning new techniques. Since the only way to do that in this day and age is in magic school, he alters his appearance to school-age and decides to accompany her back to school.

Presented with the strange Gift of Village Building, Luke, the son of a lord, is cast out of the domain in shame. He arrives in a barren land with plans to develop it as well as he can, and to live a simple, quiet life...when suddenly his mysterious Gift activates! Enjoy Luke’s amazing, slow life, and watch as his village grows, his Gift levels up, and his village-building capabilities transform in this new comedic series!

Anise suddenly gets a message on her phone one day asking whether she'd be willing to lend her their aid. As if responding to her thoughts, it chooses for her and she finds herself suddenly summoned into the world of an otome game. While Hime is dumbfounded at her situation, Hime, the girl who is summoned with her declares, "I'm the saint!" As a result, Anise is treated as useless and driven out.

If things were to continue to go on like this, then the general of the neighboring country will die, Hime, as the saint, will take over, and a tragic ending will be met. To avoid that and take her life into her own hands, Anise resolves to save the general, change the scenario, and just settle down somewhere, or that was what she planned, however...

Links:
Original Web Novel: https://ncode.syosetu.com/n0469ft/ (Japanese)

It's been one year since Rin moved to Tokyo for high school. He was told by the landlord of his apartment that he didn't have to pay rent if he takes care of the landlord's granddaughter, which he immediately accepted. However, that granddaughter, Mako, ended up being a 20 year old college student who is completely incapable of taking care of herself. Even so, it was love at first sight for Rin, and he's been taking care of her ever since.

From Peach Butts:

Amano Ichigo is a 14-year-old cake lover. After meeting a lecturer, Henrie Lucas, at a cake buffet, she enters St. Marie Academy - a school that raises and cultivates patissiers. Not only is she placed in the elitist group with three princes of sweets, but she also meets sweets spirit Vanilla on her first day of transfer. Ichigo is air-headed, a total klutz, and a complete novice at cake making, but she's trying her best mastering one at a time in order to make her eaters happy.

Hinata is a high school student who reincarnated into a different world and became a hero by the power of God. He defeated the Demon King with the help of the dark elf Mariabelle and other friends. Thus he safely fulfilled the wishes of God and returned to this world.

One month after Hinata returned to this world, for some reason Mariabelle also came here from the other world !! The reason she came here is to be with her beloved Hinata !! ~~~ With heavy love and a teaspoon of jealousy, she attacked Hinata every time he refused !! (in many ways).

Will Hinata, who has decided to live with the Yandere Mariabelle, be able to live safely (?) !! A sweet and thick romantic comedy woven around the dark elf beauty's slightly heavy schizophrenic love !!!

Zenichirou is a middle school student raised in a motherless family. His breakfast always consists of onigiri and instant miso soup from the convenience store.
Yae, a childhood friend of Zenichirou, cannot stand to see him eat such an innutritious breakfast, so she decides to make him breakfast every morning…
This story conveys a simple message: eating with another person makes miso soup taste more delicious and hearty!

Kouta Takeda who just started working at XOX Corporation, meets his new boss, a beautiful woman with big breasts named Kyouko Takizawa.

Rintaro Shido, a high school student who aspires to become a full-time househusband, is in the class with a very popular idol, Rei Otosaki. The two have no connection other than being classmates, but their relationship changes drastically when Rintaro serves Rei a home-cooked meal after she nearly collapses from hunger! The food was so delicious that Rei said, "Can I come here every day to eat?"...?!

"Why don't the two of us date...? In secret"

Tateishi, who works in accounting at a snack making company, has a secret. That secret is the existence of his cute lover that he's had since yesterday. Why keep it a secret, you ask? Because his lover is his unyielding colleague from the planning department of the same company— Mitsuya!

A pure office romance story about a couple who started their relationship in secret, and want to keep it that way!