In an anime show there was an episode where there was a couple entering through the tunnel of love and the ride got stuck and the girl ate or like licked the boyfriend and he died or like ran away. I clearly don’t remember well cause it was like during 2008 or something. Anyways, After that it went into the theme song and this was like an anime version of scooby-doo where theres like a group of people who was looking for clues on how the boyfriend died or something. So in that group of people there was like the main character and he had like yellow hair if I recall. He found green goo in one of the boat rides in the tunnel of love and took out a cotton swab and then got some of the goo and putted in a glass container. That’s pretty much what I can remember from the show.