Daisuke Mizushima and Akiko (Oshiro) had an only son named Yutaka. However, two years ago, Yutaka committed suicide because of the bullying. Two years later, the room is still the same. Akiko can't forget Yutaka, who prepares meals for three people. In front of such a couple, Yutaka's high school friend Masatoshi appears. With Yutaka's handwritten suicide note... The suicide note contains the name of the main criminal who bullied Yutaka! Masatoshi proposes a plan to his father, Daisuke.