Square Enix has opened a new website celebrating the 15th anniversary of Kingdom Hearts series – Kingdom Hearts Memorial Box. As the title suggests, the website allows fans to select from several songs including “Sora,” “Riku,” “Kairi I,” “Roxas,” “Aqua,” “The 13th Struggle,” “Blast Away! Gummi Ship I,” and “Tension Rising” as Sora wanders through various scenes from the games.

Along with this, Square Enix is giving away 15 original paper music boxes featuring the key song “Dearly Beloved.” Those interested in participating (and live in Japan) can find further details on the Music Box website.

Kingdom Hearts HD 1.5 + 2.5 ReMIX is now available in Japan for PlayStation 4. The game is due out in North America on March 28 and in Europe on March 31.