Yuhi_sama's manga / #cry(2)

From DMP: The Hybrid Child is an amazing 'doll' that can grow if it is lavished with enough love and care from its owner. Neither fully machine nor fully human, the various Hybrid Child models develop strong emotional bonds with their owners. This volume contains several short stories of love, sacrifice, and drama: Young Kotaro learns the importance of responsibility when his Hybrid Child's lifespan runs out. The tragic swordsman Seya learns to love again with the help of his Hybrid child, Yuzu. The final tale tells the story of Kuroda, the creator of the Hybrid Child designs, and how his lost love inspired their creation.

Ryou's parents got separated when he was just a little child. The last time he saw his father was just like looking at an older brother. He has been living with his mother since then, but the time has come to visit his old man. Surprised at first that he still looks very young, Ryou starts to think a lot about the past. But what will happen to him when time tricks him and he gets to live in the past?