Rumika, a classic "black gal", unexpectedly displays her tsundere slutty side in a closed room alone with a masochistic amateur old man. The old man, who she has almost no contact with on a normal basis, says "I don't dislike her as much as I thought I would", and plays around with her to make her popular. Dressed in Yosoiki★fashion, she skillfully teases the old man, saying "I'll pour you lots of my youthful essence"! ☆Gal's Live!! The paradox of a genuine masochistic old man who is driven by feelings of inferiority and intense sexual urges by verbal abuse full of familiarity from "young people these days" whom he regularly looks down on and who may sometimes even be the object of his contempt.