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Release dates
2026: Unknown platform (Japan)


Introduction: Bringing “I’m home” and “Welcome back” into your everyday life. The days you spend together don’t need to be filled with extraordinary events. Yet there are moments of laughter, moments of missed steps, moments when the heart wavers. As those small moments quietly accumulate, the “key to the heart” slowly begins to turn. Gentle, joyful, and at times bittersweet. Within the shared life where sweetness and pain intertwine, what the two of them discover is—their true feelings, hidden deep inside a box. Key la box—a love story that unlocks the heart. Story: The one who pried open my heart was a boy with magical hands. Street art on a university campus. By chance, a girl passing by found herself frozen in place, as if under a spell. At the end of her gaze was a boy, happily painting. Then, some time later... Her mother, who had remained single ever since her father passed away, decided to remarry. On the day they met, the person who appeared before the girl was that very same boy. “You’ll be living together from now on.” As she said this, she handed them a key—the key to the apartment where the two of them would live. And so, life under the same roof with him,who had suddenly become family, begins. This is a story where love mends, and love lays bare—a tale woven around the key to the heart. [Translated from the official website]
‘Without putting up a front, I proceed to love you, the one I bare my soul to.’ ‘I both love and hate you, for my heart is made up of contradictions. Thus, I fall in love with you.’ A boy with magic hands was the one who opened the gates leading to my heart——. A demonstration of street art taking place in the university’s campus. And a girl who happened to be passing by. She stopped on her tracks as if a spell had been casted on her. Her gaze fell upon a boy who was painting happily, yet wholeheartedly. Two years later——. Her mother, who had been single since the passing of the protagonist’s father, decided to remarry. The day she was to meet her new family members, the boy from that time appears before her. ‘You are going to live together from now on.’ And so she was handed ‘the key’ to the flat where they were to live together. This is the sudden beginning of her life under the same roof as the boy who has just become part of her family——. A story about the key to a heart——which love mends and desire exposes.
No reviews for Key la box yet
2026: Unknown platform (Japan)
