This is a score of Masaki Suda & Huwei Ishizaki's cover version of the song written by Miyuki Nakashima, which is also the original song of the movie "Ito", with only piano and drums Key : A♭(By the way, Miyuki Nakashima is in B♭, that is -2 key)
The drum part is faithful to the original as much as possible, but you can play freely according to your feeling such as ghost note of snare.
The piano part is faithfully recorded as the original piano part, but arranged for playing along, but if you find it difficult to play while singing, you may play only the main chord tones.
The lyrics are also included at the end of the score.