Gintoki arrives before Hosen, just in the nick of time. To restore the bond between mother and son that has been torn by the city of eternal light, Gintoki engages Hosen with fierce determination. But against the King of the Night’s awesome powers, Gintoki is beaten helplessly to the ground. “Go home to the world above with your mom…” Taking to heart the words left by Gintoki, Seita tries to escape from Yoshiwara with Hinowa, but…
Makoto's classmate Funabashi Hiwako is a member of the student council who comes from an elite family. One day, she gives fellow classmate Yumi a dressing down about her behavior, but she turns other girls in the class against her in the process. The next day after school, Makoto walks into a restroom to find a bunch of girls surrounding Hiwako.
Despite initially going to refuse, Saku ends up agreeing to help the literature club. Mihoshi acts cheerful without him there, but is still troubled by his absence. Meanwhile, the astronomy club has their hands full with making the planetarium. Mihoshi suddenly hugs Saku one day after school and rumors spread after some athletic club members see them together with Sōma. Fumie becomes concerned that Saku has been helping the literature club too much and that he may be concerned about the rumors regarding him, Mihoshi and Sōma. Hime gives Saku a journal she compiled about the planetarium's construction. Saku feels re-energized about the astronomy club and goes back to help.
Kagura can't fall asleep, so she goes to Gintoki's room and troubles him about her problem. After few methods, she finally fells asleep while listening to a story from a radio show. Unfortunately Gintoki listened to this Horror story as well, and now he can't fall aleep.
Kiyono reveals she is going to be a model for her mother's underwear collection, but has a problem with her current breast size. Nayu and the others try to help make them bigger, but to no avail. She tries doing the shoot wearing a slightly bigger bra, but it's soon noticed and when her mother confronts her about it, she runs off. Spotting some more comfortable bra prototypes, Nayu decides to decorate them to fit Kiyono's likes better. Kiyono's mother gives them their thanks, and also mentions Keigo's offer to Nayu. After being featured in the magazine as the designers, the Underwear Society are approached by the drama club to produce underwear for their costumes for the cultural festival. When Nayu asks Keigo about his offer, he tells her that he is going to Kyoto.