Two months ago, Takuya Enoki's mother passed away in an accident leaving him to take care of his baby brother, Minoru, while their father works the long hours of a Japanese "salaryman". Takuya must sacrifice playtime and childhood to take care of his brother and do the responsibilities an adult would have: cooking, sewing, and scolding while trying to find it in his heart to love the brother who is causing him so much grief.
 
(Source: Anime News Network)

Takuya is a normal Japanese elementary student whose mother died not very long ago, leaving him alone with his father and his baby brother Minoru. But his father is a busy man, and Takuya has to look after Minoru. Because of this responsibility that would normally never burden a child of his age, Takuya sometimes resents his fate and his baby brother... but his love for Minoru gives him the strength to carry on. 
(Source: Anime News Network) 
 
Notes: 
- Includes the one-shot "Time Limit". 
- Includes the one-shot "Secret Boy ni Tee Dasuna!!". 
- Includes the one-shot "Baka de Karukete Wagamama de". 
- Includes the one-shot "Natsu to Kimi no Irradiation".

Minoru Enoki