In a quiet corner of the city, four-year-old Kun Oota has lived a spoiled life as an only child with his parents and the family dog, Yukko. But when his new baby sister Mirai is brought home, his simple life is thrown upside-down; suddenly, it isn't all about him anymore. Despite his tantrums and nagging, Mirai is seemingly now the subject of all his parents' love.
To help him adapt to this drastic change, Kun is taken on an extraordinary journey through time, meeting his family's past, present, and future selves, as he learns not only what it means to be a part of a family, but also what it means to be an older brother.
[Written by MAL Rewrite]
Characters & Voice Actors

Oota, Mirai
Main
Kuroki, Haru
Japanese
Oota, Kun
Main
Kamishiraishi, Moka
Japanese
Baaba
Supporting
Miyazaki, Yoshiko
Japanese
Jiiji
Supporting
Yakusho, Koji
Japanese
Okaasan
Supporting
Aso, Kumiko
Japanese
Otousan
Supporting
Hoshino, Gen
JapanesePromotion Videos
Recommended for you
DNA² OVA
OVA
23m
Dog Days'': Limone Resort Tenbou Onsen!
Special
11m
Final Approach
TV
14m
Gakuen Heaven
TV
26m
Hua Jiang Hu Zhi Bu Liang Ren
ONA
15m
Loveless Specials
Special
2m
Sakura Wars OVA: Ouka Kenran
OVA
30m
Angel Tales
TV
22m
Granblue Fantasy The Animation Season 2 Extras
Special
23m
Touka Gettan
TV
23m
White Album
TV
25m
.hack//Intermezzo
Special
24m
Chrono Crusade: Azmaria's Lessons
Special
3m
Cutey Honey F
TV
23m