Ultraman Mebius Episode 24

During a GUYS festival, Mirai is tormented by the wicked Yapool warning him of his return. The warnings come true when blood rains from the sky and Ryu is pulled into Yapool's Dimension by a Choju. When Ryu returns, his body is now that of Yapool, who uses it to sabotage GUYS' latest project while only Mirai can do nothing except hear the evil entity's taunts. (Source: TV Tropes)