Four teenagers with different blood types come together to interpret a campus story that makes people laugh or cry.
A humble and attentive Type A person?
A free-spirited and lively Type B person?
Objective and rational type O person?
A contradictory and elegant type AB person?
Who knows, everything here can be explained by common sense, and it cannot be explained by common sense.
It involves blood type and zodiac signs, but there is no research, it is all my own understanding, so I don't like to get into it by mistake.