Histoire
Kasumi Hana visits her late brother's pen pal, Urushizawa Lily, to inform her of his death. If she had been misleading her brother, she would have murdered Urushizawa Lily. However, Lily is a blind girl who genuinely cared about Hana's brother. For Lily's sake, Hana decides to become her brother.
Synopsis via AniList (en anglais).