Gakuen Hyoryuu Senki

April 2005. A high school student is on a voyage trip with most of his girl classmates. He has been in love with his classmate Kaori for a long time, and this trip feels like the right opportunity to finally say something. Then an incident occurs. He wakes up alone on a beach with no memory of what happened after. The girl he was going to confess to is somewhere — presumably — but the situation has changed so completely that a confession is now the least immediate problem.