濑川祐太自幼失去父母，由姐姐祐理一手抚养长大，因此，祐太和姐姐有着异常深厚的感情。令祐太没有想到的是，姐姐居然嫁给了一个有着两个女儿的年长男人小鸟游信吾并且为他生下了第三个女儿。明知无法一生都和姐姐在一起，但祐太却仍然抑制不住内心的沮丧，虽然逐渐减少了和姐姐的联系，但姐姐的一举一动还是被祐太看在眼里。所以当小鸟游夫妇在飞机上不幸遇难的消息传来后，祐太毫不犹豫的收养了小鸟游家的三个可怜的女孩。个性害羞又很傲娇的小鸟游空；年龄虽小，但异常成熟懂事的小鸟游美羽；惧怕生人但格外信任祐太的小鸟游雏。大家都是曾经失去了父母的孩子，这四人能否组建一个幸福的家庭呢？
听爸爸的话！ (季节 0)
Warmth (集 1)
编剧: Naruhisa Arakawa
播出日期: 2012-07-11
运行时间: 25 min
概述: Yuuta and the girls win a family trip to a hot spring resort, where they unexpectedly followed by Raika, Kouichi and Shuntarou. As they spend time at the swimming pool, Sora becomes concerned that Raika might have feelings for Yuuta. She gets more anxious when she believes Raika wants to take Yuuta to a Lovers' Cape, though in the end, it turns out she wanted to take Hina. The next day, everyone goes to the Lovers' Cape to ring the bell together, making a wish that they'll all be together forever.
Is Sora-chan's Chastity in Danger / Miu-chan's Fashion Lesson / Hina-chan goes all by Herself (集 2)
编剧: Naruhisa Arakawa
播出日期: 2013-06-25
运行时间: 25 min
概述: Through certain circumstances, Sora and Raika end up trapped in a closet together, ending up in the further states of undress in order to try and get themselves free. Meanwhile, Miu gives some fashion advice to her friend and neighbour, Shiori Kitahara. Later, Hina goes off by herself towards a ferris wheel, causing panic amongst Yuuta and the others. After Shiori manages to find Hina and reunite them with her family at the ferris wheel, Hina reveals she wanted to go on the ferris wheel to show Yuri a picture for her birthday.
A Spring With Special Visitors (集 3)
编剧: Naruhisa Arakawa
播出日期: 2015-03-25
运行时间: 25 min
概述: Four years after their disappearance, the spirits of Yuri and Shingo decide to pay a visit to the Takanashi household to see how Yuuta and the girls have grown. After looking around the house, the pair go to observe each of the girls at their respective schools, learning that Yuuta and Sora are getting married to each other. Later, as Hina comes down with a fever, but luckily Yuuta and Sora are there to look after her. Afterwards, Sora and Yuuta give their thanks to Yuri and Shingo, who give their blessing before returning to the afterlife.
季
集 12
集 3