Heads-up:

If there are multiple adaptations, I only list the one that left the strongest impression.
I'm not making recommendations; bad works are included too.
The order is random. I just wrote things down as they came to mind. Works by the same author might be grouped together.

Manga

Citrus
- Syrup mixed with glass shards, my gateway to true Yuri. The originator of the "citrus-flavored" tag.
Bloom Into You
- A girl who doesn't know love. A girl living under a perfect mask. Masterpiece!
rainbows after storms (Hana ni Arashi)
- How did you manage to hide it for over 100 chapters? A genuine relationship is found in the simple, everyday moments.
Whisper Me a Love Song
- It's just sweet. Takeshima Eku-sensei's art style is amazing.
Still Sick
- An office fairy tale for working adults. The pink-haired protagonist looks like an adult Koito Yuu (from Bloom Into You).
Sirius: Twin Stars
- Classic Western style (the author is Spanish), straightforward communication, no beating around the bush, fast-paced development, mutual salvation.
I Want to Love You Till Your Dying Day
- Stop the pain/stabbing, I'm already numb from it. The art style is very cute.
The Filthy You Is the Cutest (Kitanai Kimi ga Ichiban Kawaii)
- Bizarre, heavy themes, not for kids. Bad Ending.
I Can't Say No to the Lonely Girl
- Sweet. Forgot the middle part. Sweet.
How Do I Get Together With My Childhood Friend?
- Classic mutual feelings held back by misunderstandings, delaying the confession.
Please Bully Me, Miss Villainess!
- The "bullying" premise baited me. The author forgot the premise halfway through, lol. But it's incredibly sweet. God-tier until chapter 97.
听星 (no English translation)
- Yuri H audio drama, quite interesting. Three couples to ship to your heart's content.
That Time I Was Blackmailed By the Class's Green Tea Bitch
- The couple plays rough, showed me that Chinese authors can be daring too!