Reincarnation 0 (Flowers)

Reincarnation 1: Worlds Intertwined (あざなわる世界) is a one-shot and the 0th chapter of the Shaman King Flowers manga.

Short Summary
Asakura Hana argues with Amidamaru about shamanism and schoolwork. Amidamaru briefly senses Asakura Hao but sees no one. When Hana returns to Funbari Onsen, he stops Tao Men from further beating up Hang Zang-Ching, Bill Burton, and Brocken Meyer. The Hana-Gumi Waitresses mock their former companions, but Tamamura Tamao threatens the girls, as well as Hana for skipping class. However, Umemiya Ryunosuke talks her into showing mercy on account of their guests. Tamao introduces Men, who uses Shamash to crush Ponchi and Conchi for their disrespect.

When Hana goes to his room, he finds Usui Horokeu there. Frustrated, Hana storms out. Along the river, he meets Hao and kicks the Shaman King before recognizing who it is. Alumi Niumbirch then introduces herself and challenges Hana to a fight, and should he win, she will marry him.