What can a 4 years old do?

"Mmm"

"So am really reincarnated as a replacement for Kazami Yuuji"

Looking at the hospital ceiling, and remembering what's the current situation of his family.

"So am just 4 years old and Kazuki's talent is already beginning to show"

"What, I'll do now is just basically secretly develop my own talent and skills before Kazuki's accident"

Suddenly the door opened and his sister and mom came with the doctor.

Satoko asks "Doctor what's my son's condition?"

The doctor answered " He's okay, the diagnosis show's no sign of a problem and maybe it's just his cold. He can also be discharged tomorrow."

Kazuki and Satoko, both let out a big sigh.

Satoko said "Kazuki, can you watch Raikou for me? Am just gonna settle the discharged procedure"

Kazuki answer " I understand Mom"

Satoko and the doctor proceed to discuss the hospital issued outside. And Kazuki went to Raikou's side.

Kazuki slowly caresses my head like it's the most precious thing in the world and says with a voice filled with worry and love.

"Raikou, you are always quiet. When there is something about you can you please tell your sister? Your older sister is always there for you, Neh."

--

The next day

In front of the hospital, the Kazami's are giving thanks to the doctor while bowing their heads.

"Doctor, thank you for taking care of my son"

"No no no, it's my job Kazami-san"

Going on their way home in the car. Raikou is still feeling like it's just a dream that he really entered the world of Grisaia. Looking at the passing scenery and realizing that this is his reality now and this is the world where he will live in. Looking at his sister and remembering the memories inside of him made him say.

"Nee-chan, I love you"

Kazuki was startled by his words and blushed. "What did you say to Raikou?"

Raikou replied. "Nothing"

Kazuki agitated and started shaking Raikou and kept pestering him for what he said earlier until they went home.

--

Getting down the car, Raikou looks at their house thinking that it's really big and has a lonely aura surrounding it. Kazuki suddenly pulls out Raikou from his daze state and as he is getting dragged to their house. But Kazuki and Raikou were suddenly stopped by their father.

"Kazuki go back to your practice"

Kazami Ryouji is a selfish man only thinking of using his surroundings as a means or tool to get what he wants. Raikou was left in the living room alone and proceeded to go to his room. And jump to his bed.

"Ha! That bastard only thinks of his family as a tool, He really should just rot in jail. Although right now in my current state I can't even kill him and get away with it. All I can do as a 4 years old is cope with his selfishness for a while. And start studying, retrain my body and skills for me to able to cope with the event that's about to happen 6 years from now."

--

5 years later