Duel Masters LOST: Tsuioku no Suishou

Win Kirifuda wakes up in Shinjuku with no memory of who he was before that day. Over the next six months he attempts to build an ordinary life through school and a part-time job, yet never quite feels that he belongs. At the same time, unexplained disappearances begin occurring throughout the city, adding to the sense that something is wrong beneath his new routine.

Everything shifts when a mysterious transfer student named Crysta claims to know the truth about Win and casually announces that they are engaged. Her arrival points toward memories he cannot reach and a hidden danger connected to the strange incidents around them. Torn between distrusting Crysta and desperately wanting answers, Win begins searching for the past he lost before another piece of the city vanishes with it.