When the twins of the Hitachiin family encounter a girl's confession, they will pretend to be each other or switch identities to respond, which is both contempt and a test.
So a girl who got the twin names mixed up sent the wrong love letter, but met the right person.
The name in your mouth may be wrong, but the person you are looking at is not wrong.
A spin-off of the 20-episode animated version.
The plot of Hikaru and Xin swapping identities and teasing the girl they confessed to was really impressive, and finally this short story was born.
Conception:
