I have no idea what this is about, so I'm just going to leave the artist commentary here:

【イメレス】バッドエンド／グッドエンド【精神的R-18G】

思考プログラムを上書きされた「東雲なの」は、二度と東雲なのに戻ることはない。
バックアップから再生された『東雲なの』は、かつての東雲なのではない。
　
　
悪魔の化身と化した「東雲なの」は倒れ、『東雲なの』は親友達の元へと帰ってきた。
　
……だがそれは、果たして大団円といえるのだろうか？
　　
　
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HARUさんの「バッドエンド(2)」（illust/25697467）の続きを考えていたら、救われない救済エンドへ突入してしまった件について。
(HARUさん、勝手な解釈すいませんorz)
　
心や魂の存在、記憶の連続性や個体への依存性、周囲とのつながりetc.
人が人であるための要素とは、果たしてどこにあるのか。

This is an image response to a series of at least three drawings by HARU-san (you can find the link to the most recent one by going to the source pixiv page) where Nano turns evil and does very bad things to Mio and Yukko.

Gaketsu's post #1110099 was also a response to the first drawing in HARU-san's series, where Nano has the daruma doll inside her (apparently what turned her evil). The title of Haru-san's original was "Destroy Me."

Image Response: Bad End/Good End (Emotional R-18G)

There's no way for the 'Shinonome Nano' whose memory was overwritten to go back to being Shinonome Nano.
The "Shinonome Nano" who was restored from a backup is not the original Shinonome Nano.

With the 'Shinonome Nano' turned evil defeated, "Shinonome Nano" returns to her friends.
　
...But is it really over?

　
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When I was thinking of a sequel to HARU-san's "Bad End (2)" (illust/25697467) I immediately gravitated towards a "Salvation When All Seems Lost End".

(HARU-san, sorry for the unauthorized interpretation orz)

The existence of the spirit or soul is connected to the continuity of memory, dependent on the individual, etc.
What exactly makes someone the person they are?