This book - red - is the first one
In fact, there is also the second part "Black Yu" be and the third part "Bai Yu" he
The second part is the earliest, the writing style is too elementary school (･᷄ὢ･᷅) The third part is just okay, I picked a time to read it
The following is the text of this article:
Old wounds are not healed, but new blood is flowing.
Junior brother is like an elf in the snow, beating in my heart for several years.
But that day, the blood under my little brother bloomed in the cold and biting snow, just like the red roses on the day we got married.
"... We just want to live well."
Intention: Love is the endless entanglement of life and death.