Takeru Takemoto, a high school student, works part-time as a (motor)bike courier. During one of his deliveries, he was struck by a weird light and fell into a forest. What he discovered was a lovely girl emerging from a luminous cocoon and calling herself "Hikari." While Takeru was mortified by Hikari's nudity, a frightening creature appeared and attacked the two. Takeru and Hikari both displayed the strength of their other selves before Takeru realized what was going on.