After hearing Hikari brag about kissing Tetsuo on the cheek, Kyōko attempts to get a kiss for herself, only to get scolded by Tetsuo when she almost drops her head in the process. Wanting to apologise by providing him with more demi-human research, Kyōko joins Tetsuo at his old university to meet his friend, Souma, who believes that her neck is a wormhole between her head and body that exists in another dimension...