A pure love story of "bittersweet emotion" and "heart-fluttering romance," connected by an unfinished song across Tokyo and Bangkok... Starring Win Morisaki and Koji Mukai (Snow Man). Morisaki plays Sota, an overly serious researcher who is assigned to work overseas in Bangkok. Mukai plays Kai, Sota's first love, who works as a photographer in Bangkok while continuing his music career. An internationally diverse and star-studded cast gathers in this Japan-Thailand co-production! Thai actors popular among young audiences, including Mean Phiravich Attachitsataporn, First Chalongrat Novsamrong, Music Praewa Suthamphong, add color to the story. The theme song is "Gravity," a newly written song by Omoinotake. The deluxe edition includes bonus disc (1) featuring a visual commentary (starring Win Morisaki and Koji Mukai), and bonus disc (2) featuring making-of footage, an event footage collection, and a trailer collection.