Young, free and madly in love. As teenagers, the world was their oyster — but as adults, their lives seem dimmer, like a very important piece is missing.

Newlyweds Nana and Shota move into an apartment building whose residents play a game declaring who they'd like to kill. Then, the murders start.

Before he was a protector, Kenshin was a fearsome assassin known as Battosai. But when he meets the gentle Tomoe Yukishiro, his story begins to change.

Kaoruko and Kazumasa Harima are a separated couple with two children. They plan to divorce once their daughter, Mizuho, enters elementary school. One day, they receive devastating news of their daughter falling into a coma after a near-drowning accident at a pool. The doctors declare her brain dead with no prospect of recovery and the couple must decide if they should donate her organs to others in need or to wait until her heart stops beating.