Igarashi, Jun

Kasumi, a serious girl who has just started at an all-girls school, discovers a letter tucked into an old book she found in the library. The letter's writer yearns to have a special relationship with another girl, like how it was described in the book.

(Source: Kadokawa, translated)

Haikei, Arishihi ni Saku Hana-tachi e

拝啓、在りし日に咲く花たちへ

Inoue, Koharu

On a whim, two gals try dating each other for a year.

#Gal to Gal no Yuri

#Gal x Gal Yuri

#ギャルとギャルの百合

Kashikaze

Kimi ga Hoeru Tame no Uta wo,

Howling Song for Husky Girl

キミが吠えるための歌を、

Emofuu

Kazuki, the daughter of a wealthy businessman, and a straight-A student at a prestigious school for girls, meets Moeka, a wild girl from a rowdy school. What becomes of Kazuki when witnessing a steamy moment between Moeka and her boyfriend leaves her all shaken up...?! Find out in this seaside tale of two polar opposites and their fated encounter.

(Source: MANGA Plus)

Ginsei no Proust

Blue Proustian Moment

銀青のプルースト

Migihara

Haneda, Usa

Once a week, Miyagi pays 5,000 yen to her classmate Sendai. The 5,000 yen is to buy three hours of Sendai's time, which gives the right for Miyagi to give her orders.

Miyagi is at the bottom of the school caste while Sendai is at the top. The two, who never crossed paths at school, spend time together after school under such a contract. Miyagi's orders are determined by her mood of the day, and Sendai cannot disobey. One day after school, Miyagi calls Sendai to her room and gives her an order that she usually does not give.

(Source: Kakuyomu, translated)

Shuu ni Ichido Classmate wo Kau Hanashi: Futari no Jikan, Iiwake no 5000-en

週に一度クラスメイトを買う話～ふたりの時間、言い訳の五千円～

Rukako

Yuuki and Asaka are childhood friends and best friends. One day Asaka, who had been confessed to by a boy, tells Yuuki, "I'm going to try dating him, just for the experience." Yuuki, unhappy at the thought of her best friend being swept away by some rando, finds herself wondering...

(Source: Hakusensha, translated)

Friend Girlfriend

フレンドガールフレンド

Yasaka, Shuu

Ayumu Ootsuki is a space lover with an ambitious dream—to meet an alien. Despite lacking friends or romantic experience, she started the Astronomy Association by herself, which is the only place where she feels she belongs. One day after school, she dropped an association poster, but an upperclassman picked it up for her. The upperclassman introduced herself as Hayami, and Ayumu completely fell in love at first sight when Hayami recognized her passion! Ayumu's mind is now filled with love, and she goes all out to share her feelings. However, the senpai seems to already adore something else. She fell for a fitness junkie?! A peculiar girl's straightforward romcom!!

(Source: Kadokawa, translated)

Baka ni Kokuhaku

バカに告白

Ono, Rin

Watashi datte Seishun shitai desu yo, Hontou wa.

The Truth Is, I Want to Enjoy My Youth Too.

私だって青春したいですよ、本当は。

Itou, Hachi

Yukiko

Mukunoki, Nanatsu

Nekotarou

Aono, Sumio

Yuama

Utatane, Yuu

Haruhana, Aya

Shikushiku

Torii, Shizuku

Aotsubaki, Toto

An anthology comic of Sasayaku You ni Koi wo Utau by various mangaka.

Sasayaku You ni Koi wo Utau: Koushiki Comic Anthology

Whispering You a Love Song Official Comic Anthology

ささやくように恋を唄う　公式コミックアンソロジー

Mikami, Teren

Kurasaki, Moroko

Sara Kureha is the reigning "Super Onee-sama" of an elite ladies' academy, a position she's earned through nothing but relentless effort. Her status is suddenly challenged by Rui Mareshino, an effortlessly perfect beauty who proposes a secret contest to determine who is truly fit to get on top. With the school-wide popularity poll just two months away, they need a way to settle the score, just the two of them. Rui's method is... quite unexpected.

"So, that's why... you're going to be my girlfriend." 
"Huh...?"

The rules of their new relationship are simple: the first one to make the other completely submit proves she is worthy of ruling the school! And so begins a secret war of seduction, with each girl launching an all-out offensive to make the other fall for them first. In this heated battle, whose heart—and body—will be the first to surrender? And who will be the one to conquer them? Prepare to be dominated by this romantic comedy showdown between two pretty girls!

(Source: Shueisha, translated)

Makemasen kara to Iiharu Kao no Ii Onnanoko wo, Zenryoku de Kuppuku saseru Yuri no Ohanashi

負けませんからと言い張る顔のいい女の子を、全力で屈服させる百合のお話

12 Manga Like 7-kakan Gentei Kanojo