Okay, I’ll try to be as spoiler free as possible, not giving away much more than what is on the first cover
Well, the summary posted is fairly spoiler free, but also doesn’t include my favorite part 
Which is maybe for the best?
It’s a good series, but really dark at times!
No no, I read 放課後保健室, not ベルサイユのバラ. I remember one of my friends back in university spending a solid hour just talking about it once, but I didn’t really look into it at the time and then forgot.
Well, I should really have a look then!
Yes.
That… less. I guess it depends on how it is handled (and how I personally feel at the time)
I’ll probably avoid that one then, but I’ll check 美しいこと
Okay, speaking of highly depressing, I just checked the trigger warnings on this one and yikes. I’ll need a comfort blanket and hot cocoa for that one.
I’m guessing you’ve already read 花ざかりの君たちへ (series) | L24?? and 桜蘭高校ホスト部 (series) | L29, but throwing them out there anyway. 
A few more suggestions:
I can’t say I’ve read many gender-bendy manga… Perhaps time to change that! 
木原成瀬 is called BLの師匠 in the Japanese BL community and for a really good reason - a ton of her books are super engrossing and creative but a lot of them are also distressing and not really the feel good fluff you’d expect with BL. The heavier books are handled well since she’s a fantastic writer, but she definitely pushes her readers (sometimes even to the edge ). If you’re ever in the mood for more ”serious” BL or randomly come across some of her books, check them out! 
美しいこと is a relatively safe place to start haha
木原音瀬 fan girl post 以上です
Wait a minute, 木原 音瀬 wrote 吸血鬼と愉快な仲間たち | L30???? I think I understand better now what you mean when you talk about darker BL. 
I’ve read a bit of the manga adaption of this one and it definitely doesn’t pull its punches in certain aspects.
Might want to fix that third kanji; took me a minute before I realized it was a typo.
Edit: lol. Was checking on the latest for the manga adaption of 吸血鬼と愉快な仲間たち since I had heard it was recently picked back up, and was shocked to see volume 5 had released without me realizing. Checked the release date and it was today.
Oh thanks! Had the more common writing of that name and not the correct kanji! Updated now! 
I have read 桜蘭高校ホスト部 up to where it was published in France before coming to Japan, but never finished it. Reading it in Japanese would be nice.
I don’t know 花ざかりの君たちへ, but since you are putting it up with the rest, it sounds very promising.
Thank you (and the others too)! That’s quite a lot of recs!
Alright, that does sound promising. If 美しいこと is on the safe side, that will help me gauge how I feel about the rest too.
oh
in that case
めんどくさがり男子が朝起きたら女の子になっていた話
山田くんと7人の魔女
technically Ranma 1/2 enters this definition too lol
don’t know if this counts since it’s cross dressing and not right out changing gender but Jellyfish Princess is awesome and it has a manga, anime AND live drama, all cute
I would like to add for 僕と彼女の××× that some of the humor is messed up 
You probably know them already - we seem to be of a similar age - but Hanakimi (花ざかりの君たちへ (series) | L24??) and Girl Got Game (POWER!! (series) | L24??) are classics in that genre.
And if you are looking for something more adult and BL: 黒ギャルになったから親友としてみた。(not on natively for obvious NSFW reasons. 
)
I didn’t know them, but they were recommended by @bibliothecary as well. I got curious and tried to hunt them down in my native language. The second one never got published in France, apparently (at least, I really cannot find any trace of it). The first did get publish and around the right time too, but I guess I missed it.
(I wasn’t that much into manga until coming to Japan, so while I read a decent amount of stuff, it’s very partial to what others were reading around me)
I thought of it too, but this one I actually read back in the days.
Checking the cover, I can see why it’s not in here.
I may or may not have already added some stuff to my Booklive shopping cart by following the 女装(BL) tag, but sure why not.
Edit: that… feels more like TL than BL, honestly. Not quite sure why it’s in the BL category.
Edit edit: ah, never mind.
This is gonna sound like a weird request but does anyone have a recommendation that includes cancer patients that isn’t a romance with them
This sort of fits:
Is it fine if that’s not a major character/plot element?
As long as it has the process terminologies, that’s more of what I’m looking for (in a non textbook way)
I can only think of two where the characters are mains and not side characters, and one I don’t recommend cause it’s trash (Dear Friends | L25) and one I can’t recommend really because I haven’t read it (死命 - not on Natively).
The latter I honestly have no idea how much it goes into the process of dealing with the illness tbh, this is the plot:
死へのカウントダウンは彼らの運命を――
余命僅かの宣告を受けた殺人願望を秘めた男と殺人犯逮捕に執念を燃やす刑事。死を恐れぬ者たちが最期に臨む戦慄の光景とは……。
若くしてデイトレードで成功しながら、自身に秘められた女性への殺人衝動に悩む榊信一。ある日、余命僅かと宣告され、欲望に忠実に生きることを決意する。それは連続殺人の始まりだった。元恋人の澄乃との皮肉な再会。犯人逮捕に執念を燃やす刑事・蒼井にも同じ病が襲いかかり、事件の展開は衝撃の結末を―。
死を恐れぬ罪人に報いを与えられるのか! もっとも注目される乱歩賞作家がおくる渾身の傑作ミステリー
性交渉の最中、相手の女を殺したくなる。殺せ、殺せ、と内なる何かが命じている――そんな殺人願望を押し殺してきた榊信一は、若くしてデイトレードで成功し、周囲から羨まれるような高級マンションに住まい、養護施設をボランティアとして訪れる好青年とみられていた。しかし、末期癌で余命がいくばくもない診断を受け〈自分の人生の証として欲望に忠実に生きる〉ことを決意。それは死の報いを恐れぬ罪人による、恐怖の連続殺人のはじまりだった。異常すぎる榊の殺人願望は、榊自身が封印した過去の記憶と関係があるのか。その鍵を握る元恋人・澄乃の登場により、彼の心は激しく動揺するが、殺人衝動を抑えることはできず、第二、第三の被害者が……。
一方、この連続殺人事件を追うことになった、刑事のひとり・蒼井凌は奇遇にも同じような死病に冒されていた。危篤に陥った妻を仕事のため見舞うこともできず失い、娘と息子とのコミニュケーションもうまくとれない男は、なぜ自らの命を削ってまで殺人犯逮捕に執念を燃やすのか。そして死を恐れぬ殺人者に、命あるうちに報いを与えることができるのか。
I bolded the relevant bits.
Thank you <333333
Thank you 
I found something that fits this to a T!!!
It’s not a full blown manga but it’s a bunch of short tweet comics about a couple that kinda shifts between boy and girl
Edit:
I deeply apologize as well as happily stand corrected
ぜんぶきみの性 is a full blown manga
