Purchase Link (DLSite): https://www.dlsite.com/maniax/work/=/product_id/RJ313659.html
Purchase Link (DMM/FANZA): https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_194479/

The grayscale alternative gallery included with the DLSite release is not included with this gallery

not meito, this is nomu

Base +6, Pokemontgmaster +6, xaelath +6, nicomasterx +6, tkg9 +17, CaptainCaption +17

It was ok I guess could have been longer and focused more on them changing mentally over time instead of just immediately jumping into identity death territory.

Base +6, karachi -6, horizon201 +6, Starwind08 -11, RighteousSwordhand +6

@JustReadingShit it looks more like he turned into the girl and was immersed in her personality until she was able to get to her room, but then after that her original personality came back, so it's not instant-identity-death. After that it looks like her male persona got assimilated by the female persona due to playing with herself.

Base +6, DDlight +6, Sylvrwolflol +8

nomu my god

Base +6, debtoryesyes +2, 70DAYS +6

沒有可愛的妹妹，那就自己當妹妹上哥哥，但我老想著如果真身還是男的，只是群體催眠...馬上瑞樹就來了。

Base +6, 5288011 +6, Mecklinger66 +4, Doviet378 +2

So what is the context for the transformation? Is he changing into his sister and his sister into him?

EDIT: NVM, I read google translated version of the sales page. interesting premise. admit not a fan of incest but do like Nomu's artwork

Base +6, debtoryesyes +2

@Deiser I don't think there's any identity death at all. In the last panel Nishimura-san (astrology club head) asks "Are you sure you don't want to go back Isozaki-kun?" and there's no confusion at all.

Isozaki still has her memories of being a boy but is too focused on loving her onii-chan to care.

Base +6, karachi +6, Sylvrwolflol +8, Kraftz +6

草，哥哥名字叫haru(悠)，弟弟名字叫sora(穹)

Base +7, er456g +6, caihongyi +6, Azuelle +4

Woah can't wait for an english translation !!

Base +12, Kraftz +6

I wouldn't say there's "no" identity death. The transformation came with the description that she loves her brother, which is then implanted into her as a subconscious compulsion. This aspect is never reversed, so when MC states at the end that she doesn't want to go back, it's still done under the effect of that compulsion. She even states that the reason she doesn't want to go back is because this gets her closer to her brother.

So I think MCs identity has been partially rewritten. It's a grey area, which is exactly what I really like about the story.

Base +7, Kraftz +6, RighteousSwordhand +6, Azuelle +5

這個社團我也想加入，然後把自己變成世界第一可愛的貧乳蘿莉

Base +7, qwe541n +6, Azuelle +5

It kind of looks like he found a formula he likes above all else, and he hasn't been doing anything else since.
TSF no F's stuff is good because it doesn't usually follow the dead tired Japanese gender bender formula to a T, but it's like after he made his first "Dude turns into his sibling's little sister" work, most of his production since then has been that.

Base +24, Kraftz +6, Azuelle +5