"Ai, try to remember the basics of cqc"

"Another one bit the D.U.S.T.".

The Good Ending.

Hold up...I don't remember this in the anime

Talha said:

Hold up...I don't remember this in the anime

It was the True Ending

BluArch-Yuzu said:

It was the True Ending

There are many ending, but we need only one, and it's this one

Ai but still alive

Ai, sidestep to his right, chop his hand to disarm him, kick him in at the side of his knees, put him in a chokehold to block off his windpipe, pull him back and knee him in the back! Then use you foot to stomp the back of his knee to immobilize him! If you have a hand free, elbow him in the back of the neck until he’s unresponsive!
If you didn’t disarm him with your first strike, grab his hand and bring it into his own abdomen! Then proceed with the previous paragraph.
Then call the police

Did Hoshino Ai just kill Kaihara Ryousuke?

Hoshino Ai is still alive