Transformed Into a White-haired Loli, and I Turned Out to Be a Tentacle Monster?

(Change + City + Cthulhu + Invincible + Multiple Female Protagonists + Female Depravity + Sticky + White-haired Lolita + Yandere + Tentacle Monster + Back Room/SCP + Super Burning Wise Battle)

Xia Li, who has been a girl for two years, has gradually accepted her identity, which is actually a good thing.

But from some day on, she gradually began to see things that normal people could not see.

This made her quite troubled, but fortunately, she had a gentle sister and a reliable best friend.

But things are getting weirder and weirder. The ordinary sister shows powerful abilities. Why does the pink-haired girl come inexplicably?