Jin, heir to his family's shrine, has secretly harbored a crush on his childhood friend, Misaki, who looks up to him with awe for his grace and dignified role as a shaman’s son. Lately, Jin’s crush has grown more sexual, and he's struggled to hide his desires, fearing it would ruin their relationship. His frustration leads him to seek help from a senior in a spiritualist club, who lends him a “miraculous” fleshlight, advising him to use it only as a last resort.

When Jin finally gives in, he becomes addicted to the "toy," unaware that its miraculous nature is connected to Misaki—every time Jin uses it, Misaki experiences it as if being tormented by an invisible force. Will this strange "toy" bring them closer together, or will the inevitable revelation of the truth behind this cursed connection tear them apart?