What happens inside a child when they discover they are no longer the center of attention?

The arrival of a sibling isn’t always a cause for celebration for the child who previously held all the attention. For adults, it can be immense joy, wonderful news, a natural expansion of the family. But for a young child, it can feel quite different: like a loss, a threat, a question they don’t yet know how to ask.

Mirai, My Little Sister delves precisely into that intimate and everyday territory. It doesn’t need grand battles or destroyed worlds to talk about growing up. A house, a family, a child who gets angry, a baby who cries, and an imagination capable of transforming the domestic into an inner adventure are enough.

Because sometimes growing up isn’t about going far away, but about learning to look at those who live next to us in a different way.

Synopsis

Kun is a young boy who lives with his parents in a modern, open, and vibrant house. Until the arrival of his sister Mirai, his world seemed to have a clear order: he received the attention, care, and undivided gaze of his parents. But the baby’s birth disrupts that balance.

Suddenly, Kun senses that something has changed. His parents are more tired, busier, more attentive to the new arrival. The house is still the same, but it no longer feels the same to him. Jealousy, tantrums, a feeling of displacement, and the difficulty of accepting that the family’s love no longer revolves solely around him emerge.

In the midst of this process, Kun begins to experience fantastic encounters with different members of his family at different points in time: his sister Mirai who came from the future, his mother when she was a child, his great-grandfather in his youth, and other presences that will help him understand that his personal history is part of a much larger family chain.

Through these experiences, Kun will discover that growing up also means learning to occupy a new place without feeling that we cease to be loved.

Will you come with me?

Kun is not a bad child. This clarification seems simple, but it’s important. Often, when a child feels jealous, protests, gets angry, or demands attention, adults can only look at the behavior. We see the tantrum, the shouting, the rejection, the resistance. But beneath all that, there’s usually something much more vulnerable: the fear of losing his place.

Kun doesn’t know how to explain what’s wrong. He can’t sit quietly and say, “I feel like my sister has arrived and now I’m not so important to you anymore.” He doesn’t have those words yet. So his unease comes out however he can: with anger, with clumsiness, with demands, with a mixture of tenderness and selfishness that belongs deeply to childhood.

The film is wise enough not to ridicule that feeling. It observes it patiently. It allows us to enter into the emotional logic of a child undergoing a profound transformation. For the adults, Mirai’s arrival marks a new stage in family life. For Kun, however, it’s an intimate revolution. His world has been turned upside down.

And perhaps therein lies one of Mirai ‘s greatest strengths : it reminds us that family changes are not experienced the same way at all ages. What is joy for some may be bewilderment for others. What adults see as growth may feel to a child as a loss of attention, security, or emotional exclusivity.

The house plays a beautiful role in the film. It’s not just a physical place; it’s almost an emotional map. Within its walls, time, memories, generations, and affections intersect. Kun enters and exits fantastical experiences that seem to spring from his imagination, but which actually serve as gateways to a deeper understanding of his own family.

Each encounter reveals something to her. When she sees her mother as a child, she begins to understand that she, too, was once little, that she, too, had desires, limitations, anger, and lessons learned. When she meets her great-grandfather, she discovers a story that predates her own, a legacy of effort, love, and decisions that made her own life possible. When Mirai appears from the future, the sister she now perceives as an intruder becomes someone with a face, a voice, a sense of connection, and a shared destiny.

This journey through family history helps Kun gradually move beyond his own center. And this is one of the most important steps in growth: understanding that our lives don’t begin and end with what we feel in this moment. We are part of a larger story. We come from others. We walk alongside others. And those who come after us don’t necessarily come to take away our love, but rather to expand the way that love flows.

Jealousy, seen in this light, is not a shameful emotion. It’s an emotion that needs to be acknowledged. Jealousy speaks of connection. We only feel threatened where something matters to us. The problem isn’t feeling it, but getting trapped in it without anyone helping us understand what it’s trying to tell us.

Kun needs to learn that love isn’t like a cake that’s divided until it’s gone. But that idea isn’t learned simply because an adult explains it. It’s learned little by little, through experience, when the child realizes that he is still seen, that he is still cared for, that he still has a place, even if that place has changed.

The film also very honestly portrays the fragility of parents. They are not perfect figures. They are tired, overwhelmed, trying to reorganize daily life, work, raising children, the home, and their own insecurities. It offers a valuable perspective on contemporary parenthood: raising children doesn’t happen in an ideal setting, but amidst real exhaustion.

Kun’s father, in particular, appears to be learning his place at home. He’s not presented as someone who knows everything, but as someone who also has to grow. This greatly expands the film’s interpretation: it’s not just the boy who welcomes a sister who grows; the adults who must learn a new way of supporting the family also grow.

In this sense, Mirai speaks of the family not as a fixed structure, but as a living organism. Each arrival, each loss, each change of stage forces a realignment of affections, time, responsibilities, and perspectives. A family does not remain the same forever. And perhaps its health depends not on nothing changing, but on its members being able to change without ceasing to feel a sense of belonging.

Kun begins the film feeling that Mirai has taken something from him. But little by little, he discovers that his sister isn’t just there to take up space, but to open up a future. That crying baby who demands attention will one day be someone with whom he’ll share memories, games, complicity, and life. The present of his jealousy prevents him from seeing it yet, but his imagination helps him anticipate a truth that his heart will take time to accept.

That’s another of the film’s beauties: imagination doesn’t appear as an escape, but as a tool for understanding. Kun doesn’t imagine to escape his family, but to understand them better. The fantastic allows him to look at the everyday with depth. And that’s where Mirai connects with many of the films in this collection: it reminds us that stories help us name what we in real life still don’t know how to order.

Ultimately, the film presents a very simple yet very difficult choice: to remain trapped in the wound of having lost one’s center, or to learn to be part of something larger. This choice isn’t resolved overnight. Kun doesn’t magically become a perfect brother. But he begins to shift internally. He begins to understand. He begins to make room.

And making room doesn’t mean disappearing. This idea is fundamental. Many people, not just children, feel that making space for others means losing value, attention, or importance. But a healthy family, community, or relationship shouldn’t work that way. Making room for others can enrich life, not diminish it.

Mirai, my little sister, invites us to look with tenderness at those little emotional earthquakes that accompany growing up. She reminds us that behind many difficult childhood behaviors lie questions of love. Am I still important? Do you still see me? Do I still have a place in your life? Can I love someone who comes into my life without feeling like I’m losing myself?

And perhaps these questions aren’t just for children. Adults need to ask them too, even if we disguise them better. Every major change forces us to readjust. Every new person can stir up insecurities. Every new position we occupy invites us to examine who we are.

That’s why Mirai fits so well within Block 4, Choosing How to Live . Because choosing how to live also means learning to live with changes we haven’t entirely chosen. Learning not to close our hearts when we feel displaced by something. Learning that loving isn’t always about holding onto the center, but about discovering that we can also grow around others.

For young people

For young people, Mirai, My Little Sister can spark reflection on our place within the family and how our relationships change as we reach new stages of life. It’s not always easy to stop being who we were and learn to be someone else: an older brother, an older sister, a growing child, someone who no longer receives the same attention or who begins to take on new responsibilities.

The film reminds us that feeling jealousy, insecurity, or fear of losing importance doesn’t make us bad people. The important thing is to learn to recognize these emotions, understand what they’re telling us, and not let them completely dictate how we treat others.

Growing up also means discovering that love doesn’t diminish when it’s shared. Sometimes it transforms, it’s rearranged, and it invites us to occupy a broader space.

For educators

From an educational perspective, Mirai offers valuable material for exploring children’s emotions, family changes, jealousy, self-esteem, and identity development. The film helps us remember that many behaviors we interpret as whims can be immature expressions of a genuine emotional need.

Educating involves looking beyond immediate behavior. Not to justify everything, but to understand it better. A child demanding attention may be asking if they still matter. A tantrum can mask fear. Rejection can be a clumsy way of asking for reassurance.

It also allows us to work on family memory and narrative identity: knowing where we come from, learning about the stories of our parents, grandparents or great-grandparents, helps us understand that our life is part of a chain of links that precedes and sustains us.

For families

For families, this film can be a particularly relatable reflection. The arrival of a new child changes the entire household. Schedules, energy levels, caregiving responsibilities, available attention, and each person’s role within the home all change.

Supporting a child who feels jealous isn’t just about telling them they should love their sibling. First, they need to feel understood. They need to know that their feelings don’t make them bad, that their place hasn’t disappeared, and that their parents’ love hasn’t ended because it has to be shared.

The film also encourages us to look at parents with compassion. Parenting isn’t about perfection, but about constant learning. Everyone in the family is growing at the same time, even if it doesn’t always seem that way.

The question that remains

Mirai, my little sister, reminds us that growing up often begins in the things closest to us. In a house. In a room. At a meal. In a tantrum. In the crying of someone who has just arrived. In the feeling that our place has changed and we still don’t know how to inhabit it.

Kun learns that loving doesn’t mean always being the center of attention. Loving also means making space. And making space isn’t about disappearing, but about discovering that our lives can expand when we stop seeing others as a threat.

Perhaps we all need to learn something from that gesture. To make room for those who arrive. To accept that relationships change. To understand that we don’t lose value when another person also needs to be seen.

Who do you need to make room for in your life without feeling like you’re losing a place for them?

Analysis by José María Sánchez Villa