H2O The mark of red sand

"H2O -FOOTPRINTS IN THE SAND-" or "H2O FOOTPRINTS IN THE SAND-" is a PC girl game developed by Makura, a Japanese game production company, as well as PlayStation 2 games, comics, and TV animations developed from it. Pillow's first work. According to the introduction at the end of the first episode of the animation, the H2O in the title comes from the first letters of the names of the three heroines (Hayami, Hinata, Otoha), and Footprints comes from a poem "Footprints in the Sand". The first half of this poem also appears at the beginning of the first episode of the animation.