It started when kouichi and Yin were transported into a world full of Titans, Feather ling's, Elves , and beast men." IN THE PRESENT, kouichi was with Reil, Caius, Dyne, Baro and Dr. Martu, They were planning about the wedding with kouichi and Caius WHILE.. Yin was inside his own bedroom chilling or experimenting with his flower collection... kouichi cared about Yin.. even though, Yin was older than him. kouichi knocked on Yins door ALL OF THE CHARACTERS ARE 18 AND ABOVE