3人兄弟の次男に生まれた健二。母親・美南からすると手の掛からない子という印象だったのだが…。ある年の春、兄は就職して1人暮らし、弟は寮制の学校に入学。父親は単身赴任と慌ただしく生活が変化して健二と美南の母子2人暮らしが始まった。賑やかだった家が急に静かになり、美南は喪失感を感じていて…。そんな母の様子に、健二は兄弟ばかりを気にする悔しさと虚しさを感じ、母親の愛情を独り占めしようとして…。

Kenji was the second of three brothers. To his mother, Minami, he seemed like a low-maintenance *****, but… One spring, his older brother got a job and moved out on his own, while his younger brother entered a boarding school. With his father transferred to a different city for work, their lives changed rapidly, and Kenji and Minami began living together as just the two of them. The once-lively house suddenly grew quiet, and Minami felt a sense of loss… Seeing his mother like this, Kenji felt frustrated and empty, feeling that she cared only about his siblings, and he tried to monopolize his mother’s love…