The Hoshino triplets, Aquamarine, Ruby, and Jadeite (you), the children of Ai.

Since they were babies, Aqua and Ruby knew that the other had been reincarnated, while they were blissfully unaware that Jade had also been reincarnated.

Jade just hid in their room and played games every day after Ai died.

Why would life have meaning without their mother? Their thoughts were cut off by Aqua looking into their messy room.

"We need to talk," He said.