r. Someone adds poison to the biscuits and put it in the Kyoko's stuff. Someone was trying to murder Kyoko Kirigiri.
c. Light Yagami takes the knife which was left in the garden when everyone else leaves it there to go to the parlor to watch monokuma motivation video. Light knew something about the people who were behind the whole thing.
k. Light Yagami makes a deal with Kyoko in the hallway when everyone else is still busy in parlor cause of the motivation videoes. Light promises Kyoko to give her information if she helps him with his plan.
e. Kyoko gives the biscuits and the key to Light so he has some food while he could isolate himself in the dining room. Light has a knife, biscuits and the mansion key inside the dining room, where he stays there for all day till he dies.
g. Light Yagami locks the door from inside.
d. Light Yagami eats the poisoned biscuits in the dining room.
o. Light Yagami started to vomit blood. He realized that he is poisoned and that he is about to die. This happens sometime before dinner time.
m. Kyoko brings him some canned for dinner to see how he is and to see if he can share more details with her.
p. Light Yagami rejects the dinner and explains to Kyoko about the poison. She realizes that if he dies like this, she will be the blackened so they make a quick plan. Their plan was to wait for everyone to sleep, so Light would open the dining room door and he would show Kyoko the information he got before killing himself.
Everyone goes to sleep.
Kyoko Jumps in the garden using the Kitchen window and sneaks in the dining room using the dining room window. Light is not feeling well enough to follow the same path. Kyoko asks him for the key so she could lock the guest room, then they could use the hallway instead of windows.
t. Kyoko takes the key, so she can sneak inside the mansion again (Using the kitchen window) and lock the guest room.
f. Kyoko locked the guest room so no one can hear or see light getting out of the dining room from the door.
The door of the dining room was locked from inside so she couldn't open it from the hallway.
b. Kyoko opened the kitchen window and jumped in the garden with the key in her hands.
s. Kyoko gives light the key through the dining room window. But Light asks her to allow him to do something alone before he shows Kyoko those pieces of evidence he was talking about.
i. Light Yagami locks the window.
n. Light tries to unlock the door but halfway there he feels dizzy and falls on the ground as the poison starts to affect him sooner.
a. Light Yagami Stabbed himself, trying to make sure that he will be the blackened of the case himself as he promised that to Kyoko.
j. Light Yagami dies because of the poison as he couldn't take the knife out to stab himself again.
h. Kyoko who watched him die goes back to the servant's room as her guarding shift is about to finish.
l. Mitsuha sees dirt on the oven and realized someone used the kitchen window so she opens it and jumps in the garden.
q. Mitsuha finds the dead body in the dining room and screams.
This case has unresolved mysteries. To be continued...
The people who saw the light dead before the body announcement: "Kyoko, Mitsuha, and Spike"
The Murder Weapon: Poison
Case final result: Failed